InfiniteCalc

Construction Calculators

Gravel, concrete, asphalt, lumber, drywall, stairs, and roofing — material and project calculators for builders and DIYers.

Gravel Calculator
Find how much gravel you need in cubic yards and tons for any length, width, and depth.
Cubic Yard Calculator
Convert length, width, and depth into cubic yards for concrete, mulch, gravel, or soil.
Cubic Feet Calculator
Get the volume of any box shape in cubic feet, cubic yards, cubic meters, liters, and gallons.
Asphalt Calculator
Convert driveway dimensions into tons of hot-mix asphalt, cubic yards, and estimated cost.
Board Foot Calculator
Calculate board feet and total lumber cost from thickness, width, length, and quantity.
Stair Calculator
Turn a total rise into risers, treads, exact riser height, total run, and stringer length.
Roof Pitch Calculator
Convert rise and run to roof pitch, or any x/12 pitch to degrees, slope %, and rafter length.
Drywall Calculator
Estimate drywall sheets, joint compound, tape, and screws for any room from its dimensions.

About our construction calculators

Ordering materials is where construction projects go over budget: order too little gravel and you pay a second delivery fee; order too much asphalt and you eat the cost. These construction calculators convert your project dimensions into exact material quantities — cubic yards of gravel or fill, tons of asphalt, sheets of drywall, board feet of lumber — using the same math suppliers use, including standard density figures and waste factors.

The layout tools handle the geometry that codes care about. The stair calculator turns a total rise into a code-friendly riser height and tread run (and flags anything outside the common 7–11 rule). The roof pitch calculator converts between rise-over-run, the x/12 notation roofers quote, and degrees — so you can talk to a contractor in their language.

Every result shows the formula and a worked example, and quantities include a sensible overage allowance where the trade normally adds one. Estimates are for planning: always confirm final quantities with your supplier, and check your local building code for stairs, structural, and roofing work.