About the Concrete Footing Calculator
Concrete for strip or pad footings, including multiple footings and the total excavation volume.
Also known as: strip footing calculator, pad footing concrete, foundation concrete, footing volume.
How to use this calculator
- Enter footing type, width, depth, waste allowance and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Volume = length × width × depth × number of footings
Worked example
Using the values pre-filled in the calculator above:
- Footing type: Strip footing
- Total length = 30 m
- Width = 0.6 m
- Depth = 0.3 m
- Waste allowance = 8 %
- Mix ratio: 1 : 1.5 : 3 (M20) — 20 MPa — slabs and footings
the calculator returns:
- Concrete required: 5.832 m³
- Per footing: 5.4 m³
- Cement bags (50 kg): 48
- Sand: 2.449 m³