Convert concrete weight into volume using the density you enter. Choose kilograms, pounds, metric tonnes or U.S. tons, then calculate cubic metres, cubic feet, cubic yards and litres. Because concrete density changes with mix type and materials, this calculator does not force one density value. Every numeric field uses a faint 0 placeholder only — the zero is not a real entered value.
The faint 0 inside every numeric field is only a placeholder. Type your value directly — entering 5 gives 5, not 05.
Your result appears after you press Calculate Volume.
Weight and volume are connected by density. If you know the mass of concrete and the density of that concrete, divide weight by density to get volume in the matching unit system.
Convert mass into practical volume units without assuming every concrete mix weighs the same per unit volume.
Convert kg using density in kg per cubic metre.
Convert pounds using density in pounds per cubic foot.
See the concrete volume in metric cubic metres.
Compare the same volume with ready-mix ordering units.
Use the density that matches your concrete material.
Save weight, density and converted volume results.
Concrete weight can be converted to volume when the density of the concrete is known. Density expresses how much mass is contained in a unit volume. If weight and density use compatible units, the calculation is simply weight divided by density.
Volume = Weight ÷ DensityFor metric calculations, kilograms divided by kilograms per cubic metre produce cubic metres. For U.S. customary calculations, pounds divided by pounds per cubic foot produce cubic feet.
Concrete does not have one universal density. Density can change with aggregate type, air content, moisture, mix proportions, lightweight or heavyweight materials, and whether the stated mass refers to fresh or hardened concrete. That is why this calculator leaves density blank instead of forcing one default.
Enter the concrete weight in kilograms and density in kg/m³. The calculator divides kilograms by kilograms per cubic metre, leaving cubic metres.
Concrete m³ = Weight (kg) ÷ Density (kg/m³)Enter weight in pounds and density in lb/ft³. Dividing the two gives cubic feet. The result is then converted automatically to cubic metres, cubic yards and litres.
Concrete ft³ = Weight (lb) ÷ Density (lb/ft³)One metric tonne equals 1,000 kilograms. The Metric Tonnes option converts tonnes to kilograms first and then divides by the entered density in kg/m³. This is useful when demolition, transport or bulk material records are stated in tonnes.
One U.S. short ton equals 2,000 pounds. The US Tons option converts short tons to pounds and divides by the density in lb/ft³. The result is calculated in cubic feet first and then converted to cubic yards and cubic metres.
| Example Weight | Density Used | Calculated Volume | Approx. Other Unit |
|---|---|---|---|
| 2,400 kg | 2,400 kg/m³ | 1.000 m³ | 1,000 L |
| 4,800 kg | 2,400 kg/m³ | 2.000 m³ | 2,000 L |
| 145 lb | 145 lb/ft³ | 1.000 ft³ | 0.0370 yd³ |
| 3,915 lb | 145 lb/ft³ | 27.000 ft³ | 1.000 yd³ |
| 2.4 t | 2,400 kg/m³ | 1.000 m³ | 1.308 yd³ |
These are arithmetic examples using the displayed density values. They are not universal density recommendations for all concrete.
Different concrete types can have significantly different densities. Lightweight concrete uses lower-density aggregates or systems, while heavyweight concrete can use dense aggregates for radiation shielding or other specialised purposes. Always match the density to the actual material.
Fresh concrete density can differ from the density of hardened concrete because of water loss, air content and other changes. If you are converting a truck ticket, fresh batch mass or hardened demolition weight, confirm that the density basis matches the material condition you are estimating.
This type of conversion can help with demolition estimating, disposal planning, truck payload checks, material inventory, precast component checks, laboratory calculations and comparing scale weights with geometric volume.
If broken concrete is weighed at a scale, dividing by solid concrete density estimates the equivalent solid material volume. It does not calculate the loose volume of rubble in a truck or container, because broken concrete includes void space between pieces.
The calculator standardises the result into several common units. One cubic metre is approximately 35.3147 cubic feet. One cubic yard contains exactly 27 cubic feet. Litres are also shown, with 1 cubic metre equal to 1,000 litres.
This calculator does not identify concrete type from weight alone, estimate reinforcement weight, calculate rubble bulking, choose density, determine moisture content or provide structural design. It performs a density-based mass-to-volume conversion using the numbers you enter.
Continue with the Concrete Volume To Weight Calculator, kg/m³ To lb/yd³ Converter, lb/ft³ To kg/m³ Converter and Concrete Volume Calculator.
The formula is simple, but unit consistency is what makes the answer meaningful.
Produces cubic metres.
Produces cubic feet.
Converts metric tonnes to kilograms first.
Converts short tons to pounds first.
Answers about density, kilograms, pounds, tonnes, cubic metres and cubic yards.
Divide the concrete weight by its density, keeping the units consistent.
The 0 is only a placeholder, not an entered value. Typing 5 gives 5 rather than 05.
No. Density varies with the concrete type and mix, so enter the density appropriate for your material.
Yes. Enter weight in kg and density in kg/m³.
Yes. Enter weight in lb and density in lb/ft³.
Yes. The calculator converts tonnes to kilograms first.
Yes. The calculator converts short tons to pounds first.
Yes. It also shows cubic metres, cubic feet and litres.
Yes, if you enter the correct lightweight-concrete density.
Yes, if you enter the correct density.
No. It converts mass to volume using density.
Yes. The PDF includes weight, density and converted volume results.
Use project-specific material data alongside authoritative concrete and measurement resources.
Concrete standards, technical resources and education.
Visit ACIReady-mixed concrete technical and educational resources.
Visit NRMCAMeasurement and SI unit resources from the U.S. National Institute of Standards and Technology.
Visit NIST Metric ResourcesConcrete and cement educational resources.
Visit PCA