Concrete Calculator
Estimate concrete volume for slabs, footings and walls in cubic feet and cubic meters, plus cement bags needed.
🔄 Updated October 13, 2026
About the Concrete Calculator
Planning a build or renovation? The Concrete Calculator gives fast, reliable planning estimates. Estimate concrete volume for slabs, footings and walls in cubic feet and cubic meters, plus cement bags needed. Figures include a small waste allowance where relevant. For bigger projects, compare with the Concrete Calculator and Gravel Calculator.
How to use this calculator
- Enter your numbers in the fields above.
- Results update instantly — no button to press, no page reload.
- Adjust the inputs to compare scenarios with the Concrete Calculator.
Keep exploring: Paint Calculator · Tile Calculator · Brick Calculator · Square Footage Calculator
Frequently asked questions
How much concrete do I need for a slab?
Enter length, width and thickness — the calculator gives volume in cubic feet and meters instantly.
How many cement bags per cubic meter?
Roughly 6.5 bags of 50kg cement per cubic meter for a standard 1:2:4 mix. Always order 5–10% extra.
Is this estimate exact?
It is a planning estimate. Waste, formwork and site conditions can change actual needs.