Concrete Calculator
Calculate how much concrete you need for a slab, footing, or similar pour.
Calculate
Enter your values below.
Result
Concrete volume
0
Bags needed
0
Formula used
Volume = Length × Width × Depth
Example: 5m × 4m × 0.1m = 2 m³.
How to use this calculator
- Enter Length (m), Width (m), Depth (m), Volume per bag (m³).
- Press Calculate to see your result instantly.
FAQ
Frequently asked questions
What unit is the volume in?
Cubic meters, based on the meter measurements you enter.
Where do I find my bag's yield?
It's usually printed on the bag packaging, often around 0.017 m³ for a standard 25kg bag — check your specific product.
Should I order extra concrete?
Many contractors add 5-10% extra to account for spillage and uneven subgrade — this calculator gives the exact theoretical volume.
Can I use feet instead of meters?
Yes, as long as you're consistent — the bag yield should then also be in cubic feet.