Big plans.
Precise numbers.
Calculate material quantities for your project.
From the first yard of concrete to the final coat of paint. Get the material quantities you need, before you get to work.
What are you building?
All calculators
Site work & landscaping
Driveways, beds, grading, and fill — order the right tons and yards.
Exterior & structure
Slabs, roofs, siding, fences, decks, and stairs, sized to code and to spec.
Interior & finishing
Drywall, paint, tile, flooring, and wallpaper for the finish work.
Estimating guides
How to Calculate Wallpaper
Work out how many rolls a room needs, allow for pattern repeat, and avoid the dye-lot mistake that ruins an otherwise good job.
Read the guide ↗How to Calculate Stair Stringers
Work out riser count, riser height, total run and stringer length for a set of stairs — with the IRC limits that make the layout legal.
Read the guide ↗How to Calculate Roof Square Footage
Turn a building footprint into true roof area using the slope factor, convert square feet to roofing squares, and work out shingle bundles.
Read the guide ↗How to Calculate Roof Pitch
Measure roof pitch with a level and a tape, convert it to degrees, and use the slope factor to turn a footprint into real roof area.
Read the guide ↗How to Calculate Cubic Feet
The cubic feet formula for any box, room, bed or appliance — plus the inch, yard and metre conversions people get wrong, with worked examples.
Read the guide ↗How to Calculate Concrete Yardage
Work out cubic yards for any slab, footing or pour, decide between bags and ready-mix, and understand why square yards is the wrong unit.
Read the guide ↗