19 free calculatorsBuy the right amount.
Buy the right amount.
See how it adds up.
Plan the right amount of material. See the formula, include waste, and switch between imperial and metric. No sign-up.
- Formula shown
- Waste included
- Imperial + metric
- No sign-up
Example · 10 × 10 ft slab, 4 in deep62 bags of 80 lb concrete33.33 cu ft · 10% waste included
Start with your project
Find the calculator for your job
Concrete
Bags, pours and concrete blocks.
Landscape
Soil, gravel, mulch, sand, pavers and walls.
Lumber & decking
Board feet, deck boards, plywood and drywall.
Trim
Baseboard for one room or many.
Measure & convert
Volumes, square feet, acres and weight.
How it works
Three steps to a shopping list
- 1
Measure
Enter length, width and depth in feet, inches, meters or centimeters.
- 2
Calculate
See the result with its formula, the constants behind it and their sources.
- 3
Buy
Counts round up to whole bags, boards or sheets. Confirm the product with your supplier.
Know what goes into the answer.
Every calculator shows its formula, its sources and how it rounds. Read how the numbers are checked.