Concrete, roofing, framing, and more. Get instant answers to any construction calculation.
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From concrete to roofing, footings to fractions. All the jobsite math in one place.
Add, subtract, multiply, and divide in feet, inches, and fractions.
Square footage for rectangles, triangles, circles, and trapezoids.
Convert length, area, and volume between imperial and metric.
Cubic yards and bag count for slabs, sidewalks, and pads.
Block count and mortar bags for walls and foundations.
Concrete volume for strip footings and spread footings.
Total squares from roof footprint and pitch.
Convert between X:12 rise/run, degrees, and percentage.
Bundles, starter strips, ridge caps, and underlayment.
Find the hypotenuse, a missing side, and angles from two known values.
Cubic yards and bag count for round columns, piers, and Sonotubes.
Common rafter length from the run and roof pitch.
Gallons of paint needed from wall area, coats, and coverage.
Sheets and screws for walls and ceilings, plus a waste factor.
Mud boxes and joint tape for finishing drywall seams.
Rolls of wallpaper from wall area and pattern-repeat waste.