Concrete project calculators
Concrete Project Calculators - Slabs, Footings and Bags
Estimate the concrete quantity for a slab, pier hole or square footing after the dimensions and specified thickness are known.
Outdoor Project Calculators
Choose the right concrete quantity tool
Concrete projects use different shapes and measurements. Use the slab calculator for area-based pours and the footing calculator for repeated round or square supports, then replace the sample yield with the product label.
Planning reference
A practical concrete estimate
- 1Measure each pour separately
Keep slabs, pads and footings separate when the thickness, shape or concrete product changes.
- 2Use specified dimensions
Enter the finished slab thickness or the actual footing diameter, width and depth from the plan.
- 3Use the current product yield
Bag yield, ready-mix minimums, delivery access and local pricing can change the purchase decision.
- 4Separate quantity from design
These tools estimate concrete quantity. They do not size reinforcement, soil support, frost protection or structural loads.
Concrete calculator FAQ
Which concrete calculator should I use?
Use the slab calculator for rectangular slab sections and the footing calculator for repeated round piers or square footings.
Does the footing calculator design the foundation?
No. It calculates concrete volume from dimensions you provide. Local code, soil, loads and reinforcement determine the design.
Why does bag count vary by product?
Bag yield and package size vary. Replace the default yield with the value printed on the current product label.
Should I add an ordering allowance?
A small allowance can cover handling and measurement differences, but it does not replace a supplier quote or account for poor excavation.