Calculate How Much Concrete You Need For A Straight Ramp, A Ramp With A Landing, A Ramp With Side Slopes Or A Known Concrete Volume. Enter The Ramp Length, Width And Rise, Add Any Landing Or Side-Wedge Dimensions, Include A Waste Allowance And Estimate Cubic Metres, 20 Kg Bags And Concrete Cost.
Select The Ramp Shape That Best Matches Your Project. All Numeric Entries Start At 0, And The Result Stays Hidden Until You Press Calculate Concrete Ramp.
Your Result Will Appear Here After You Press Calculate Concrete Ramp.
The PDF Includes The Site Name, Ramp Type, Measurements, Waste Allowance, Base Volume, Order Volume, Bag Estimate And Concrete-Only Cost.
A Simple Solid Ramp Can Be Treated As A Triangular Prism. The Side Profile Is A Triangle, So The Volume Is Half The Length × Rise, Multiplied By The Ramp Width.
Use The Tool To Estimate Main Ramp Volume, Landing Concrete, Side-Wedge Concrete, Bag Quantity And A Simple Concrete-Only Cost.
Calculate The Base Concrete Quantity For A Solid Ramp Wedge In Cubic Metres.
Add A Rectangular Landing To The Ramp When The Project Includes A Level Platform.
Estimate Two Additional Triangular Side Wedges Where The Ramp Flares Out.
Add A Percentage For Small Differences In Excavation, Forms And Placement.
Convert Concrete Volume Into Whole Bags Using The Yield You Enter.
Enter Your Own A$/m³ Rate To Build A Simple Concrete-Only Budget.
A Concrete Ramp Calculator estimates how much concrete is required to form a sloping solid ramp. The simplest ramp can be modelled as a triangular prism: the side profile is a right triangle, and that triangular area extends across the ramp width. This means the volume is half of length × rise × width.
Real ramps can include landings, flared side slopes, thickened edges, footings, transitions and non-uniform base conditions. The calculator therefore includes separate options for a straight ramp, a ramp with a landing, a ramp with two side wedges and a known-volume entry.
Volume (m³) = ½ × Length (m) × Width (m) × Rise (m)
For example, a ramp 6 metres long, 1.5 metres wide and 600 mm high at the upper end has a rise of 0.60 metres. The base volume is ½ × 6 × 1.5 × 0.60 = 2.70 m³ before any allowance.
If you only need a standard slab calculation, use the internal Concrete Calculator Australia. If the ramp is part of a path or access route, the Concrete Walkway Calculator may also be useful for adjoining flat sections.
Ramp rise is often shown in millimetres. Divide by 1000 before using the value in a cubic-metre formula. A rise of 150 mm becomes 0.15 m, 300 mm becomes 0.30 m, 450 mm becomes 0.45 m and 600 mm becomes 0.60 m.
| Ramp Rise | Rise In Metres | Use In Formula |
|---|---|---|
| 100 mm | 0.100 m | 0.100 |
| 150 mm | 0.150 m | 0.150 |
| 300 mm | 0.300 m | 0.300 |
| 450 mm | 0.450 m | 0.450 |
| 600 mm | 0.600 m | 0.600 |
A landing is a level platform, so it is calculated as a rectangular slab rather than a triangular wedge. Calculate the ramp wedge volume first, calculate the landing length × landing width × landing thickness, then add both values.
Total Volume = Ramp Wedge Volume + Landing Length × Landing Width × Landing Thickness
The calculator keeps the landing thickness separate from the ramp rise because those are different dimensions. A landing may be a relatively thin slab while the ramp rise can be much larger.
Some ramps flare out at the sides rather than ending with vertical side faces. The side-slope option adds two extra triangular wedges along the ramp length. Each side wedge is estimated as half × ramp length × side-slope width × ramp rise. Because there are two sides, the total side-wedge volume is doubled.
Side Volume = 2 × (½ × Ramp Length × Side Slope Width × Ramp Rise)
The main ramp body is still calculated from the top ramp width. This gives a simple geometric model for a ramp with symmetric flared sides. Real projects can have more complex side profiles, so use the actual design geometry where necessary.
This calculator uses the horizontal run in the wedge-volume formula. If your drawing gives the sloped surface length instead, do not automatically substitute it without checking the geometry. The correct volume model depends on the base and side profile being represented.
For a simple solid wedge, the triangular side area is based on horizontal run × vertical rise ÷ 2. The sloped surface is useful for finishing or surface-area calculations, but it is not the same dimension as the horizontal run in the triangular volume formula.
There is no single allowance that fits every ramp. Accurate forms on a well-prepared base may be close to the theoretical volume. Irregular excavation, uneven subgrade, thickened edges and transitions can create more variation. The calculator starts at 0 so you choose a project-specific percentage.
Small ramps, thresholds or repair wedges can sometimes be completed with bagged concrete. Enter the manufacturer-stated yield per bag and the calculator converts the concrete volume into a whole-bag estimate.
Bags Required = Required Concrete Volume ÷ Product Yield Per Bag
For bag-focused estimating, use the internal Concrete Bag Calculator. Always use the exact yield from the product data sheet rather than assuming every 20 kg bag produces the same volume.
Enter your current concrete rate per cubic metre and the calculator multiplies that rate by the estimated concrete volume. This is a concrete-only cost. It does not include formwork, reinforcement, labour, subbase, excavation, pump hire, finishing, curing, handrails or other project costs.
Use the Ready Mix Concrete Cost Calculator when delivery, short-load, pump and other supplier charges need to be included. Use the Concrete Labor Cost Calculator to estimate placing and finishing labour separately.
A volume calculator cannot decide whether a ramp slope is suitable or compliant. Accessible ramps can be subject to detailed requirements for gradient, landings, clear width, handrails, edge protection, transitions and circulation space. Those requirements depend on the applicable project type, jurisdiction and design standard.
Use the dimensions required by the relevant drawings, designer, engineer, building professional or authority. The calculator should be used only after the required geometry has been established.
The straight-ramp option models a solid concrete wedge. Some real ramps are constructed over compacted fill, masonry, foam, structural framing or another substrate, with only a relatively uniform concrete slab thickness on top. In that case, a solid-wedge calculation can greatly overestimate concrete.
If the ramp is a slab of approximately uniform thickness placed over prepared fill, calculate the concrete from slab area × thickness rather than treating the entire rise as solid concrete. The actual construction detail should determine which formula is appropriate.
For a ramp with a constant slab thickness over a sloping prepared base, calculate the sloped surface area and multiply by slab thickness. This requires the sloped length, not just the horizontal run. Because that is a different geometry from a solid wedge, it should be calculated separately from the main tool above unless your project documents clearly define a solid ramp.
Reinforcement requirements depend on structural design, loading, support conditions, slab thickness and crack-control strategy. The calculator does not determine mesh, bar size, dowels or anchorage. Use the reinforcement shown in the project documents.
Exterior ramps need careful drainage and surface finishing. The required crossfall, drainage path, surface texture and slip resistance can affect formwork and finishing, but those details do not change the basic volume formula unless they materially change the concrete section.
This calculator estimates concrete quantity only. It does not select ramp gradient, rise, run, clear width, landing size, handrails, edge protection, slab thickness, reinforcement, concrete strength, joints, drainage, surface finish, slip resistance, curing method or structural design.
For general Australian concrete industry information, visit Cement Concrete & Aggregates Australia. For silica and work-safety guidance, consult Safe Work Australia.
Length, Width, Rise And Any Extra Landing Or Side-Wedge Geometry Determine The Concrete Volume.
The Horizontal Run Used In The Solid-Wedge Calculation.
The Width Of The Main Ramp Body Across The Direction Of Travel.
The Vertical Height Difference Converted To Metres Before Multiplying.
Landings, Side Wedges And Thickened Areas Should Be Added Separately.
These Examples Show Geometry Only. They Do Not Define Suitable Ramp Slope, Accessibility Or Structural Dimensions.
| Example | Dimensions | Calculation | Base Volume | With 10% Allowance |
|---|---|---|---|---|
| Small Ramp | 2 m × 1.2 m × 150 mm Rise | ½ × 2 × 1.2 × 0.15 | 0.180 m³ | 0.198 m³ |
| Medium Ramp | 4 m × 1.5 m × 300 mm Rise | ½ × 4 × 1.5 × 0.30 | 0.900 m³ | 0.990 m³ |
| Large Solid Ramp | 6 m × 1.5 m × 600 mm Rise | ½ × 6 × 1.5 × 0.60 | 2.700 m³ | 2.970 m³ |
| Ramp + Landing Example | 4 m Ramp + 1.5 × 1.5 × 100 mm Landing | Ramp + Landing | 1.125 m³ | 1.238 m³ |
| Known Volume | 1.000 m³ | Direct Entry | 1.000 m³ | 1.100 m³ |
Concrete Volume Is Only One Part Of A Ramp Budget. Forming, Base Preparation, Reinforcement, Finishing And Access Details Can Add Significant Cost.
Quick Answers About Ramp Volume, Landings, Side Slopes, Bags, Cost And Accessibility.
For A Simple Solid Wedge Ramp, Multiply Length By Width By Rise In Metres And Divide By Two.
The Side Profile Of A Simple Solid Ramp Is A Triangle. A Triangle Has Half The Area Of A Rectangle With The Same Base And Height.
Calculate The Ramp Wedge Volume, Calculate The Landing As A Rectangular Slab, Then Add The Two Volumes Together.
Yes. The Ramp + Side Slopes Option Adds Two Triangular Side Wedges To The Main Ramp Body.
Only If The Geometry Matches A Solid Concrete Wedge. A Ramp Built As A Constant-Thickness Slab Over Fill Should Be Calculated From Sloped Surface Area × Slab Thickness Instead.
Yes. Enter The Manufacturer-Stated Yield Per Bag And The Calculator Converts The Required Volume Into Whole Bags.
No. It Estimates Concrete Volume Only. Required Ramp Gradient And Accessibility Details Must Come From The Applicable Project And Regulatory Requirements.
A Project-Specific Allowance Can Help Cover Small Variations In Forms, Base Levels And Placement. The Right Amount Depends On The Real Job.
The Calculator Starts Clean So The Result Uses Only The Measurements And Rates You Enter. Reset Also Returns Every Numeric Field To 0.
No. It Multiplies Concrete Volume By The A$/m³ Rate You Enter. Labour, formwork, reinforcement, delivery fees and other project costs are separate.
It Can Estimate Simple Concrete Geometry If The Construction Matches One Of The Available Shapes. Structural thickness, reinforcement and transition design must come from the project requirements.
The PDF Includes The Site Name, Ramp Type, Main Measurements, Waste Allowance, Base Volume, Order Volume, Bag Estimate And Concrete-Only Cost.
Use Current Project Documents, Supplier Information And Australian Industry Or Safety Guidance Alongside Any Online Ramp Estimate.
Australian Industry Information And Technical Concrete Resources.
Visit CCAANational Information About Silica Hazards And Safe Work Requirements.
Read Silica GuidanceConfirm Ramp Geometry, Structural Requirements, Reinforcement And Support Conditions.
Confirm Required Gradient, Landing, Handrail, Edge And Circulation Details For The Actual Project.