About this tool
Find how much concrete and how many bags you need for a slab or a round column.
Slab: length × width × depth. Round column: π × (diameter ÷ 2)² × height × number of columns. Bags = volume × (1 + waste) ÷ yield per bag.
Formula: V = L·W·d · V = π(D/2)²·h
Example: Shape = Slab / footing, Length (m) = 4, Width (m) = 3, Depth (cm) = 10, Extra for waste = 10, Yield per bag (m³) = 0.0175 → Concrete volume (m³) = 1.2, Volume with waste (m³) = 1.32.
A 40 kg bag of premix yields about 0.0175 m³; check the yield printed on your bag.
Quick steps
- Enter your values — every field shows its unit.
- Press Calculate (or Try an example to see how it works).
- Read the results and copy them if you need them elsewhere.
The calculation runs in your browser. Nothing you type is sent to 1CLIK.
FAQ
How does the Concrete Calculator work?
Slab: length × width × depth. Round column: π × (diameter ÷ 2)² × height × number of columns. Bags = volume × (1 + waste) ÷ yield per bag.
What should I keep in mind?
A 40 kg bag of premix yields about 0.0175 m³; check the yield printed on your bag.
Is my data sent anywhere?
No. The numbers stay on your device; the page only shows the result.