CutOnce - Builder's Calculator

Tired of fumbling with decimal conversions on the jobsite? CutOnce is a construction calculator built for the way you actually measure in feet, inches, and fractions. Type measurements the way you say them. Add, subtract, multiply, and divide in feet-inch-fraction format and get exact answers down to 1/64". No converting to decimals. No rounding errors. No wasted material. FEET-INCH-FRACTION MATH • Enter measurements naturally: 3' 5-3/16" + 2' 10-1/2" • Add, subtract, multiply, and divide all in fractions • Choose your precision: 1/2" through 1/64" • Results displayed in feet-inches-fractions or inches-fractions STAIR CALCULATOR • Enter total rise and get a complete stair layout • Unit rise, unit run, number of treads and risers • Stringer dimensions with headroom check • Export a detailed PDF with cut dimensions for the shop RAFTER CALCULATOR • Common rafters from span or run • Ridge height, birdsmouth, and tail cuts • HAP, overhang, and slope calculations • PDF export with all the cut angles you need HIP & VALLEY RAFTERS • Hip and valley rafter lengths and angles • Backing angles and cheek cuts • King common and jack rafter spacing • Full PDF export for the crew RIGHT ANGLE CALCULATOR • Solve any right triangle from two known sides • Enter in feet-inches-fractions, get results the same way • Find the diagonal, rise, or run instantly • Perfect for squaring walls, checking layouts, and cutting braces BUILT FOR THE JOBSITE • Works on iPad and iPhone • English and Spanish language support • No internet required. Works offline • No ads. No subscriptions. Just a calculator that works. Whether you're framing walls, cutting stringers, laying out rafters, or squaring foundations, CutOnce gives you accurate answers in the units you actually use.