Home project calculators

Estimate materials and costs before you start.

Plan outdoor projects and room renovations with material quantities, complete purchase units, and costs you can adjust.

No account neededEditable local pricesFormulas included
Live calculator

Concrete slab

US units
Concrete to order3.5 yd³Or 147 nominal 80 lb bags
Metric inputs and ordering details in the full calculator.Open full calculator →

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A useful estimate starts with clear assumptions.

1

Enter real dimensions

Use the measurements you have. Switch units without redoing the math.

2

Adjust assumptions

Change material allowances and enter supplier or contractor rates for your project.

3

Plan with a range

See quantities and a realistic range instead of a suspiciously precise single number.