A construction calculator that speaks the job site's language.

Feet, inches, and fractions—exact math, no drift. Purpose-built for construction, Western Construction Calculator combines a dedicated keypad for fast, familiar entry with an Advanced Tools section that goes beyond what any handheld calculator can do.

Get it on Google Play See how it works

Available now on Google Play for Android.

Western Construction Calculator main keypad screen

Built for feet, inches, and fractions

Every calculation is stored as an exact fraction of an inch, so repeated add/subtract never drifts the way floating-point math does.

Feet · Inches · Fractions

Enter and read values the way they're marked on a tape measure, like 4'-6-3/8". Add, subtract, and convert without ever leaving that format.

Voice Input

Speak a measurement naturally -- "forty-eight feet five and three quarters inches" -- and it's entered for you. Useful when you need to enter multiple dimensions from a blueprint.

Stairs

Riser, tread, and stringer calculations from total rise, max riser height, and tread depth -- plus stairwell floor-opening length.

Roofing

Rafter length, pitch, and angle from run and rise. Solve for any two of run, rise, diagonal, or pitch, and get common, hip, valley, and jack rafter lengths.

Board Feet

Thickness × width × length, straight to board feet, for lumber takeoffs on the fly.

Circles & Arcs

Solve diameter, radius, circumference, or area from any one of them, plus arched-opening geometry from chord, rise, radius, or angle.

Polygons

Full angle, bisect angle, side length, perimeter, and area for any regular polygon, from the number of sides and one known dimension.

Area, Volume & Roof Materials

Area and volume calculations that go either direction, plus roof covering takeoffs -- squares, shingle bundles, and sheathing sheets -- from plan area and pitch.