Rex says
Everyday utility math — the kind you'd otherwise pull up four browser tabs for. I keep it to one clean answer.
Try a scenario
Click to load — tweak from there.Inputs
Result
Concrete needed
2.72
cubic yards (with waste)
Cubic feet (no waste)
66.7
60-lb bags (estimate)
163
Psst — share this and help Rex grow
One click, a permanent link with your numbers baked in.
How to use this
- 1Enter length (ft).
- 2Enter width (ft).
- 3Enter thickness (in).
- 4Enter waste / overage (%).
- 5Read your concrete needed on the right — it updates as you type.
- 6Hit Share to keep the scenario or send it to someone.
About this calculator
Estimate concrete volume for a rectangular slab from length, width, and thickness.