Convert concrete volume to estimated weight for slabs, demolition, transport, disposal, structural planning and material handling. Enter cubic yards, cubic feet or cubic metres, choose an appropriate concrete density, and see pounds, US tons, kilograms and metric tonnes in one result.
Select the starting unit, enter the concrete volume or weight, then choose a planning density. Every numeric field starts empty and only displays a faint zero placeholder, so typing 5 gives 5 rather than 05.
Your result will appear here after you press Calculate Weight.
The PDF includes the starting volume or weight, density used and equivalent weight/volume units for planning reference.
Concrete weight is estimated by multiplying volume by density. If the volume is in cubic feet and density is in pounds per cubic foot, the result is pounds. Other volume units are first converted to cubic feet so the same relationship can be used consistently.
The tool separates the volume, density and final mass/weight equivalents so you can see exactly which assumption drives the estimate.
Convert a ready-mix or demolition volume in cubic yards to estimated weight.
Use smaller project volumes directly with density stated in pounds per cubic foot.
Convert metric concrete volumes to pounds, kilograms and tonnes.
Choose an example density or enter your own measured/project-specific value.
See US short tons and metric tonnes alongside pounds and kilograms.
Save the input, density assumption and weight/volume equivalents for reference.
A concrete volume to weight calculation combines two pieces of information: how much space the concrete occupies and how dense the concrete is. Volume can be measured in cubic yards, cubic feet or cubic metres. Density expresses how much mass or weight is contained in each unit of volume. Once both are known, the calculation is straightforward.
Weight = Concrete Volume × Concrete Density
If volume is entered in cubic feet and density is in pounds per cubic foot, the result is pounds. If your starting volume is in cubic yards, multiply the cubic yards by 27 to get cubic feet first because one cubic yard contains exactly 27 cubic feet. If your starting volume is in cubic metres, convert the cubic metres to cubic feet or use a density stated in kilograms per cubic metre.
Concrete is a mixture, not a single pure substance. Its density depends on the aggregate type, cementitious content, water, air content, admixtures and mix design. Lightweight aggregate can reduce density, while dense aggregates can create heavyweight concrete. Fresh concrete density may also differ from assumptions used for hardened concrete or structural dead-load calculations.
ASTM C138/C138M covers determination of the density of freshly mixed concrete and related yield calculations. That is an important distinction: a generic online calculator can multiply a volume by an assumed density, but a measured test value or project-specific design value is better when the exact concrete matters.
For rough planning, normal-weight concrete is often represented by values around 145 to 150 lb/ft³. FHWA technical examples use 145 lb/ft³ in pavement property modelling and also show 2,400 kg/m³ / about 150 lb/ft³ for portland cement concrete in another design example. These are useful estimating references, not universal values for every concrete mix.
One cubic yard equals 27 cubic feet. At 145 lb/ft³, one cubic yard weighs approximately 3,915 lb, or about 1.958 US tons. At 150 lb/ft³, one cubic yard weighs 4,050 lb, or 2.025 US tons. The 135 lb difference between those two examples shows why density selection matters when the volume becomes large.
| Density | Weight Per ft³ | Weight Per yd³ | US Tons Per yd³ |
|---|---|---|---|
| 115 lb/ft³ example | 115 lb | 3,105 lb | 1.553 tons |
| 125 lb/ft³ example | 125 lb | 3,375 lb | 1.688 tons |
| 135 lb/ft³ example | 135 lb | 3,645 lb | 1.823 tons |
| 145 lb/ft³ example | 145 lb | 3,915 lb | 1.958 tons |
| 150 lb/ft³ example | 150 lb | 4,050 lb | 2.025 tons |
| 155 lb/ft³ example | 155 lb | 4,185 lb | 2.093 tons |
| 175 lb/ft³ example | 175 lb | 4,725 lb | 2.363 tons |
| 200 lb/ft³ example | 200 lb | 5,400 lb | 2.700 tons |
A cubic metre is larger than a cubic yard. Using a 150 lb/ft³ density gives roughly 2,403 kg/m³, while 145 lb/ft³ is roughly 2,323 kg/m³. The calculator converts all volume internally so you can enter cubic metres and still see pounds, kilograms, US tons and metric tonnes.
Weight (lb) = Cubic Yards × 27 × Density (lb/ft³)
For example, 3 yd³ at 150 lb/ft³ gives 3 × 27 × 150 = 12,150 lb. Divide by 2,000 to get 6.075 US tons. In kilograms, that is approximately 5,511 kg.
Cubic feet are the most direct match for density in lb/ft³. A 10 ft³ concrete volume at 145 lb/ft³ weighs approximately 1,450 lb. At 150 lb/ft³, the same volume weighs approximately 1,500 lb.
Weight (lb) = Cubic Feet × Density (lb/ft³)
If you know density in kg/m³, multiply cubic metres by kg/m³. If your density is in lb/ft³, convert the cubic metres to cubic feet first. One cubic metre is approximately 35.3147 cubic feet.
| Concrete Volume | Approx. Pounds | Approx. US Tons | Approx. Kilograms |
|---|---|---|---|
| 1 ft³ | 150 lb | 0.075 tons | 68.0 kg |
| 5 ft³ | 750 lb | 0.375 tons | 340.2 kg |
| 10 ft³ | 1,500 lb | 0.750 tons | 680.4 kg |
| 0.25 yd³ | 1,012.5 lb | 0.506 tons | 459.3 kg |
| 0.50 yd³ | 2,025 lb | 1.013 tons | 918.5 kg |
| 1 yd³ | 4,050 lb | 2.025 tons | 1,837.1 kg |
| 2 yd³ | 8,100 lb | 4.050 tons | 3,674.1 kg |
| 5 yd³ | 20,250 lb | 10.125 tons | 9,185.3 kg |
| 10 yd³ | 40,500 lb | 20.250 tons | 18,370.5 kg |
| Concrete Volume | Approx. Pounds | Approx. US Tons | Approx. Kilograms |
|---|---|---|---|
| 1 ft³ | 145 lb | 0.073 tons | 65.8 kg |
| 5 ft³ | 725 lb | 0.363 tons | 328.9 kg |
| 10 ft³ | 1,450 lb | 0.725 tons | 657.7 kg |
| 0.25 yd³ | 978.75 lb | 0.489 tons | 443.9 kg |
| 0.50 yd³ | 1,957.5 lb | 0.979 tons | 887.9 kg |
| 1 yd³ | 3,915 lb | 1.958 tons | 1,775.8 kg |
| 2 yd³ | 7,830 lb | 3.915 tons | 3,551.6 kg |
| 5 yd³ | 19,575 lb | 9.788 tons | 8,879.1 kg |
| 10 yd³ | 39,150 lb | 19.575 tons | 17,758.2 kg |
Lightweight concrete uses lower-density constituents or systems to reduce unit weight. The exact density can vary widely depending on the product and application. The calculator includes a 115 lb/ft³ example as a planning preset, but that value is not a universal definition and should not replace a specified or tested density.
Heavyweight or high-density concrete can use dense aggregates where additional mass is useful, such as shielding or counterweight applications. The 200 lb/ft³ preset is included only as an example. Actual heavyweight concrete may differ substantially, so enter a custom density when the project data provides one.
The density of freshly mixed concrete is commonly checked as part of quality control because it is connected to yield and air content. Hardened concrete may be considered differently for structural dead loads or handling. Water loss, air, moisture state and mix constituents can affect the measured value. Know which density your source refers to before using it.
Demolition planning often starts with dimensions. Calculate the volume of the slab, wall, footing or structure, then multiply by an appropriate density to estimate weight. But broken concrete contains void space when loaded into a dumpster or truck. The in-place concrete volume and the loose debris volume are therefore not the same thing.
Weight limits can be more restrictive than container volume for concrete debris because concrete is dense. Before loading a dumpster, trailer or truck, confirm the provider's maximum payload and material restrictions. An online calculator cannot determine whether a specific vehicle, container or lifting setup is safe.
Do not use only the nominal cubic capacity of a trailer or truck. Payload is a weight limit. A small geometric volume of concrete can weigh several thousand pounds. Check the vehicle's rated payload, gross vehicle weight limits, axle limits and local rules. If you are moving broken concrete, account for other materials, tools and the weight of the container or trailer itself.
Lifting precast concrete, slabs, barriers or other concrete elements is a high-consequence task. Use verified element geometry, reinforcement details, embedded hardware, actual concrete density, rigging configuration and engineered lifting information. This calculator can provide a preliminary number, but it is not a lifting plan.
Yes. Reinforced concrete elements contain steel in addition to concrete. A concrete-only weight estimate does not automatically include reinforcing bars, mesh, plates, anchors, embedded items, conduits or finishes. For large structural elements, these additions can materially affect total dead weight.
Moisture state can influence measured mass. Concrete can contain absorbed moisture or surface water depending on exposure. Aggregate moisture also affects fresh concrete batch proportions. For general estimating, a representative density may be sufficient; for precise testing or handling, use the required measurement procedure and project conditions.
First calculate slab volume from length × width × thickness. If dimensions are in feet, the result can be cubic feet. If thickness is in inches, divide it by 12 before multiplying. Once the volume is known, use this calculator to estimate weight. For the initial volume, the Concrete Volume Calculator or Concrete Slab Estimator can help.
A patio weight estimate is calculated the same way: determine the patio volume, then apply density. Use the Concrete Patio Calculator for rectangular, round or irregular patio geometry before converting the result to weight.
Post-hole concrete volumes are small individually but can add up across a long fence. The Concrete Fence Post Calculator can establish the concrete volume or bag quantity. Use the resulting volume here when a total weight estimate is useful for material handling.
A concrete block wall is not a solid slab of concrete because blocks contain cells and may be hollow, partially grouted or fully grouted. Do not apply a solid-concrete density to the overall wall dimensions and assume it equals the wall weight. Use manufacturer block weights, grout quantities and reinforcement information instead. For quantity takeoff, use the Concrete Block Calculator.
The calculator converts pounds to kilograms using 1 lb = 0.45359237 kg. It then divides kilograms by 1,000 for metric tonnes. US short tons use 2,000 lb per ton, so they are different from metric tonnes.
A US short ton equals 2,000 lb, while a metric tonne equals 1,000 kg, which is about 2,204.62 lb. Always identify which “ton” is being used in a quote, disposal limit or transport document because the two units are not interchangeable.
The reverse calculation divides weight by density. If you know concrete weighs 4,050 lb and you use 150 lb/ft³, the estimated volume is 27 ft³ or 1 yd³.
Volume = Weight ÷ Density
The calculator does not store 0 as the starting value. Instead, each numeric field is blank and shows a faint placeholder zero. This means if you click the box and type 5, you get 5 rather than 05. Resetting also clears the field rather than inserting a real zero.
A generic density may be reasonable for early budgeting, rough demolition comparisons, educational examples or preliminary logistics screening where the consequences of a small error are low. It becomes less appropriate as the decision becomes more safety-critical, regulated or cost-sensitive.
Use project-specific density for structural calculations, precast handling, crane planning, major demolition, bridge work, load-rated transport, laboratory documentation or situations where the project specification requires a particular method. ASTM C138/C138M provides a standard method for fresh concrete density and related yield calculations.
A driveway can contain several cubic yards of concrete even when it does not look especially thick. To estimate its weight, first establish the driveway volume from length × width × thickness. If the dimensions are in feet and the thickness is in inches, convert the thickness to feet before multiplying. A 4-inch thickness is 0.3333 ft, a 5-inch thickness is 0.4167 ft and a 6-inch thickness is 0.5 ft. Once you know cubic feet or cubic yards, apply the selected density. This weight estimate can help with demolition planning, disposal budgeting and understanding how much material is present, but it does not determine whether a vehicle, trailer or dumpster can legally or safely carry the load.
Footings can be deceptively heavy because they often have substantial width and depth below ground. A continuous strip footing is typically estimated as length × width × depth. Individual pad footings can be calculated separately and added together. Convert the total geometric volume into weight using a density that matches the specified concrete. If a footing contains heavy reinforcement, anchor cages, base plates or other embedded steel, add those components separately when total lifted or demolished weight matters.
A solid cast-in-place concrete wall can be estimated from wall length × wall height × wall thickness. Openings for doors, windows and penetrations should be deducted where appropriate. The resulting concrete volume can then be converted to weight. Do not treat hollow concrete masonry walls as solid concrete; concrete blocks, grout and reinforcement require a different takeoff. For masonry unit quantities, use the Concrete Block Calculator rather than applying solid-concrete density to the whole wall envelope.
Concrete stairs often combine treads, risers, landings and supporting mass. Estimating the weight accurately may require splitting the shape into simple rectangular prisms or using dimensions from structural drawings. Once each part is converted to volume, add the volumes and multiply by density. If the stairs are precast and will be lifted, use the manufacturer or engineer's certified element weight instead of a generic online estimate whenever that information is available.
Long curbs and gutters can produce significant total weight because even a relatively small cross-section is multiplied by a long run. Find the cross-sectional area, multiply by length to obtain volume, then convert that volume to weight. Municipal curb profiles may include slopes, channels or irregular shapes, so drawing dimensions should take priority over simplified assumptions. The same approach applies to barriers, channels and other repeated linear concrete sections.
Precast concrete products are often handled as individual pieces, making element weight especially important. Geometry-based calculations can provide an early estimate, but precast manufacturers normally account for inserts, reinforcement, recesses, voids and the actual concrete mix. If certified piece weights are supplied, those should be used for lifting, shipping and installation planning. The calculator is most useful during early design or comparison when final piece weights are not yet available.
Concrete countertops are much smaller than slabs or foundations, but their weight matters because cabinets and support framing must carry the finished load. Measure the top surface area and multiply by thickness to obtain volume. Include thickened edges or integral backsplashes if they are solid concrete. Decorative lightweight mixes may have a different density from ordinary concrete, so a custom density is preferable when the product manufacturer provides one.
For repeated precast pavers, panels or tiles, calculate one unit's volume and weight, then multiply by quantity. Manufactured units may include cores, ribs or tapered profiles that make simple length × width × thickness inaccurate. Manufacturer-stated unit weights are usually more reliable for logistics, pallet loading and installation. Geometry is a useful cross-check when exact product data is unavailable.
A cylindrical concrete core can be estimated from π × radius² × length. If diameter and length are measured in inches, convert the resulting cubic inches to cubic feet before applying lb/ft³ density, or use a consistent metric density. In laboratory work, however, weighing the actual core directly is generally preferable because it avoids assumptions about density and accounts for the real sample condition.
Test cylinders and round concrete elements use the cylinder volume formula. For a known diameter and height, divide diameter by two to get radius, calculate π × radius² × height, and ensure the dimensions are in consistent units. The volume can then be multiplied by density. This is useful for educational checks, but laboratory test procedures should follow the applicable standard rather than relying on a generic density estimate.
Entrained or entrapped air occupies volume without adding the same mass as solid and liquid constituents. All else equal, increasing air content can reduce concrete density. This is one reason fresh concrete density measurements can be useful for quality-control and yield calculations. A calculator preset cannot infer actual air content, so project-specific test results are more appropriate when density needs to reflect the delivered batch.
Aggregate makes up a large portion of concrete volume and strongly influences density. Natural normal-weight aggregates produce familiar structural concrete densities, lightweight aggregates reduce unit weight, and dense aggregates can substantially increase it. Two mixes with the same cubic-yard volume can therefore have very different total weight. Custom density is the safest calculator mode when aggregate type is known to differ from normal-weight concrete.
Cementitious material, water, aggregate proportions, admixtures and air all contribute to the mass contained in a fixed concrete volume. Changes that improve strength or workability do not translate into one predictable density change without knowing the whole mixture. Avoid assuming that higher compressive strength always means a specific higher weight. Density and strength are related to mixture composition in different ways and should not be substituted for each other.
Fresh concrete density is connected to yield because a known batch mass combined with measured density can indicate how much volume the batch produces. ASTM C138/C138M covers fresh density and gives formulas related to yield. For site ordering, however, ready-mix is purchased by volume. This calculator does not determine batch yield from ingredient weights; it converts a known or assumed volume into estimated weight using density.
Concrete demolition creates a logistics problem as well as a cutting and breaking problem. Heavy fragments may require machinery for handling, and hauled debris can quickly approach payload limits. Estimating the in-place concrete weight before demolition helps planners compare dumpster sizes, truck trips, disposal charges and equipment needs. It should be treated as a planning number until actual site conditions, reinforcing steel and debris characteristics are known.
A solid slab has relatively little internal void space, but broken pieces do not pack perfectly together. Air gaps form between chunks, increasing the loose bulk volume. That means one cubic yard of in-place concrete does not necessarily become one cubic yard of debris in a container. The mass is similar aside from removed materials and moisture differences, but the occupied container volume can be larger. This is why weight and container volume need to be considered separately.
Some disposal services charge by weight, some by container, and some combine a base allowance with overage charges. A concrete weight estimate can help compare those pricing structures. Before budgeting, ask whether the facility uses US tons or metric tonnes, whether reinforcement must be removed, whether clean concrete receives a different rate, and whether soil, asphalt, brick or mixed demolition material changes the price.
Ready-mix truck capacity is normally discussed in volume, but the concrete itself is extremely heavy and the truck has gross-weight and axle constraints. The permissible load can depend on local rules, truck configuration and concrete density. Do not assume a truck can carry its theoretical drum volume at any density. Suppliers determine legal and practical load sizes for their equipment and jurisdiction.
Concrete pumps move material by volume, but density contributes to the mass being accelerated and supported in the pumping system. Pump selection, line pressure, boom configuration and placement planning involve many factors beyond total concrete weight. Use supplier or pump-contractor guidance rather than this calculator to size pumping equipment. The weight result is useful mainly for understanding project scale.
Fresh concrete exerts pressure on vertical formwork, but formwork design is not simply total concrete weight divided by wall area. Placement rate, temperature, slump, vibration, mixture behaviour, form height and other factors can influence lateral pressure. A volume-to-weight calculator must not be used as a substitute for engineered formwork design or the applicable design standard.
Structural engineers account for the self-weight of concrete as part of dead load. A density assumption is therefore important, but the correct design value depends on the structural code, material specification and project requirements. This calculator can illustrate how volume and density relate, but it does not perform structural analysis, determine load combinations or verify member capacity.
Placing concrete, precast units or demolition debris on an existing floor can create concentrated or distributed loads that exceed the floor's capacity. Even a relatively small pile of broken concrete may weigh several thousand pounds. Never use the calculator result alone to decide whether a floor, platform, scaffold or temporary structure can support stored concrete or debris.
Crane capacity depends on much more than object weight. Radius, boom configuration, reeving, rigging, wind, ground conditions and load chart restrictions all matter. If a concrete element is to be lifted, use a verified weight and an approved lifting plan. The estimate from this page can help identify the order of magnitude during early planning, but it is not a crane selection tool.
Forklift ratings are affected by load centre and attachment configuration as well as nominal capacity. A concrete block, panel or pallet may also have an uneven centre of gravity. Use manufacturer-rated load charts and verified item weights. Do not assume that a forklift labelled for a certain capacity can safely carry any concrete object below that number in every configuration.
Shipping precast concrete can be limited by trailer payload, axle distribution, permitting and route restrictions. Multiple elements may need to be arranged to balance load while staying within legal dimensions and weight. Use certified piece weights and professional transport planning for actual shipments. A generic volume conversion is suitable only for preliminary budgeting and comparison.
Recycling facilities may crush clean concrete into aggregate products. Incoming material is often tracked by weight, which makes pre-demolition weight estimates useful for predicting tonnage. Actual scale tickets remain the authoritative record because reinforcing steel, attached materials, moisture and incomplete removal can cause the hauled weight to differ from the calculation.
Weight per square foot depends on slab thickness and density. At 150 lb/ft³, a 4-inch slab (one-third of a foot) is about 50 lb/ft² of concrete. A 6-inch slab (half a foot) is about 75 lb/ft². At 145 lb/ft³ those figures are approximately 48.3 and 72.5 lb/ft². These are geometry-based examples, not structural load recommendations.
| Slab Thickness | Weight / ft² @ 145 lb/ft³ | Weight / ft² @ 150 lb/ft³ | Concrete Volume / 100 ft² |
|---|---|---|---|
| 3 in | 36.25 lb/ft² | 37.50 lb/ft² | 25.00 ft³ |
| 4 in | 48.33 lb/ft² | 50.00 lb/ft² | 33.33 ft³ |
| 5 in | 60.42 lb/ft² | 62.50 lb/ft² | 41.67 ft³ |
| 6 in | 72.50 lb/ft² | 75.00 lb/ft² | 50.00 ft³ |
| 8 in | 96.67 lb/ft² | 100.00 lb/ft² | 66.67 ft³ |
| 12 in | 145.00 lb/ft² | 150.00 lb/ft² | 100.00 ft³ |
For metric work, multiply thickness in metres by density in kg/m³. A 100 mm slab is 0.10 m thick. At 2,400 kg/m³, it contains about 240 kg of concrete per square metre. A 150 mm slab at the same density contains about 360 kg/m². Again, these are simple self-weight examples and do not include reinforcement, finishes or live loads.
Suppose a slab is 20 ft × 20 ft × 4 in thick. The area is 400 ft² and the thickness is 4/12 = 0.3333 ft. Volume is approximately 133.33 ft³, or 4.938 yd³. At 150 lb/ft³, the concrete-only weight is about 20,000 lb, or 10 US tons. At 145 lb/ft³, it is about 19,333 lb, or 9.667 US tons.
The same 20 ft × 20 ft slab at 6 inches thick has 200 ft³ of concrete, or about 7.407 yd³. At 150 lb/ft³ the estimated weight is 30,000 lb (15 US tons). This demonstrates how strongly thickness affects both volume and total weight.
Bagged concrete is sold by dry package weight, while the hardened volume depends on product yield and water addition. Do not simply add bag labels to estimate the final concrete weight without considering the mixing water and actual yield. For bag quantity, use the manufacturer's stated yield or the Concrete Bags Per Cubic Yard Calculator, then use project-specific density if you need hardened or fresh concrete mass.
Concrete is not the same material as cement. Cement is one binder component within concrete. Concrete also contains aggregate, water and often supplementary cementitious materials or admixtures. A cubic yard of concrete therefore weighs far more than the cement contained in that cubic yard. Use concrete density when estimating the complete concrete mass.
Mortar has different proportions and aggregate size from concrete, so its density should not automatically be assumed identical. Masonry walls also contain units, joints, voids and possibly grout. If you are estimating a brick or block wall, use product-specific masonry weights and mortar/grout quantities rather than a solid-concrete density.
Loose gravel has substantial void space between particles, while concrete binds aggregate into a more continuous mass. Bulk density of loose aggregate and density of hardened concrete are therefore different concepts. Do not use a gravel tons-per-yard value as a substitute for concrete density.
Unit consistency is essential. A density of 150 lb/ft³ must be multiplied by cubic feet to produce pounds. If volume is in cubic yards, multiply by 27 first. If density is in kg/m³, multiply by cubic metres to produce kilograms. Mixing units without conversion is one of the most common causes of incorrect weight estimates.
If a project report states fresh concrete density as 147.8 lb/ft³, select Custom Density and enter 147.8. If the specification gives density in kg/m³, convert it to lb/ft³ before using this version of the custom field, or use the equivalent relationship in your project spreadsheet. The custom option is designed to remove dependence on generic presets.
The calculator can display precise decimals, but the underlying volume and density may not be equally precise. A rough slab measurement should not be presented as an exact final weight to the nearest pound. For budgeting, rounding to tens or hundreds of pounds may be appropriate. For formal engineering, use the required calculation and reporting procedure.
Even if density is known accurately, an incorrect thickness or hidden footing can change the real concrete volume significantly. Recheck dimensions, include thickened edges, beams and pads, and separate irregular shapes. For demolition, drawings may not perfectly match field conditions, so exploratory measurement can improve estimates before major logistics decisions are made.
A difference of only 5 lb/ft³ becomes 135 lb per cubic yard. Across 20 yd³, that is 2,700 lb of difference. This is why the distinction between 145 and 150 lb/ft³ matters more on large projects than on a tiny repair. Custom density becomes increasingly valuable as volume and consequence increase.
For a small patch of one cubic foot, a 145–150 lb/ft³ assumption produces roughly 145–150 lb of concrete. This can help determine whether material must be moved in smaller batches or whether demolition pieces will be manageable by hand, but personal lifting safety depends on shape, grip, posture and individual capability, not just total weight.
Large foundations can contain tens or hundreds of cubic yards. At those volumes, generic density differences translate into many tons. Structural and construction planning should therefore rely on design documentation, quantity takeoffs and appropriate engineering data rather than a single simplified web estimate.
The result does not automatically include reinforcement, post-tensioning steel, embedded plates, anchors, conduit, finishes, waterproofing, attached masonry, soil, formwork or construction equipment. It also does not calculate centre of gravity, lifting points, axle loading, bearing pressure or structural capacity. Add or analyse those items separately where relevant.
For more project planning, use the Concrete Weight Per Cubic Yard Calculator, Concrete Cubic Foot Calculator, Concrete Quantity Calculator, Concrete Pouring Calculator and Total Concrete Cost Calculator.
These values show how much the density assumption can change the estimated weight of exactly the same concrete volume.
Example lower-density planning value.
FHWA-used normal-weight example value.
Common normal-weight planning example.
Example high-density planning value.
Quick answers to common questions about converting concrete volume into estimated weight.
Multiply the concrete volume by an appropriate density. Keep the volume and density units consistent.
It depends on density. At 145 lb/ft³, one yd³ is about 3,915 lb. At 150 lb/ft³, it is about 4,050 lb.
The weight of one cubic foot equals the selected density in lb/ft³. For example, at 150 lb/ft³, one cubic foot weighs about 150 lb.
It depends on density. A planning density near 2,400 kg/m³ gives roughly 2.4 metric tonnes per cubic metre.
No. 150 lb/ft³ is a common planning value, but actual density varies with aggregate, air content, mix design and other factors.
Use the density specified for the project or measured for the mix when accuracy matters. Presets in this calculator are planning examples.
No. Results represent concrete only unless you separately account for reinforcement and embedded items.
You can estimate the weight of the original concrete volume, but loose broken debris occupies a different bulk volume because of voids.
Use it only as a preliminary estimate. Confirm actual payload, axle, gross vehicle and local legal limits before hauling.
Not as the sole basis. Lifting concrete requires verified geometry, density, reinforcement, rigging and engineered lifting information.
A US short ton is 2,000 lb. A metric tonne is 1,000 kg, about 2,204.62 lb.
Divide the weight by the density after converting units so they match.
Concrete density is not universal. Custom density lets you use project-specific or measured information instead of a generic preset.
The zero is only a placeholder. The field is actually blank, so typing 5 produces 5 rather than 05.
Yes. Calculate first, then use the PDF button to save the main inputs, density and output values.
Use project documents and current standards alongside any online estimate, especially where weight affects safety or compliance.
Current ASTM test method covering density (unit weight), yield and gravimetric air content of fresh concrete.
View ASTM C138/C138MFHWA pavement research examples include concrete unit-weight inputs around 145–150 lb/ft³.
View FHWA Concrete ExampleAnother FHWA example uses approximately 2,400 kg/m³ / 150 lb/ft³ for PCC.
Read FHWA Design InputsCalculate the concrete volume first when starting from slab, footing or other dimensions.
Open Concrete Volume Calculator