Concrete Calculator
Concrete volume for slabs, footings, columns and steps — bags or ready-mix.
Runs in your browser — nothing is uploaded—
Details
Material estimates only — add waste, confirm quantities with your supplier and follow local building codes. Not an engineering guarantee.
How to use Concrete Calculator
- Enter your values — the unit for each field is shown next to it.
- The result updates instantly as you type.
- Copy the results, or change inputs to compare scenarios.
Formula & assumptions
Slab: length × width × thickness
Column: π × (diameter ÷ 2)² × height
Bags = volume × 2,350 kg/m³ ÷ bag weight