Builder Calc
The feet-inch-fraction construction calculator for iPhone, iPad and Mac.
Type 5 Feet 3 Inch 1 / 2 Inch, add, subtract, multiply and divide in feet, inches and fractions, then solve the job: rafters, stairs, concrete, circles, board feet. The keys are laid out like the handheld calculator the trade has used for decades, so there is nothing to learn.
- Dimensional math in feet-inch-fraction, decimal feet, inches, yards and metric, with 1/2 to 1/64 resolution
- Rafters: pitch, rise, run, diagonal, plumb and level cuts, regular hip/valley, jack rafters at any spacing
- Stairs: riser height and count, treads, stairwell opening, stringer length, incline, riser-limited for code
- Concrete: slabs, footings, columns in cubic yards, bags, cost per unit
- Circles and arcs: area, circumference, arc length, chord, segment rise, arched walls
- Materials: board feet, studs on center, sheets, blocks, roofing squares
- Paperless tape, four memories, long-press any key for help
Free and Pro
All dimensional math and conversions are free, forever. Pro unlocks unlimited project solutions (stairs, rafters, concrete and the rest) with a single purchase that covers iPhone, iPad and Mac. No subscription will ever be added.
Accuracy
The engine reproduces the worked examples of the industry-standard handheld's user guide to the sixteenth of an inch, and every example is an automated test that runs before each release.
Privacy
Nothing leaves your device. No account, no analytics, no ads. Read the privacy policy.
Support
Questions and requests: support page.