Measure once. Calculate once. Build right.
CutOnce is the construction calculator for contractors, builders, and DIYers. Get accurate material estimates, cut lists, and measurements in seconds.
Construction math shouldn't slow you down.
You know the measurements. You know the materials. But calculating board feet, concrete volumes, and rafter angles by hand? That eats up time and invites errors.
A wrong calculation means wasted material, extra trips to the supply house, or worse — a re-cut.
One app. Every calculation.
CutOnce handles the construction math you do every day. Fractions, angles, material quantities, unit conversions — enter your numbers, get your answer.
No formulas to remember. No spreadsheets to maintain. No internet required. Just fast, accurate results on your iPhone or iPad — even on the job site with no signal.
Fraction Calculator
Add, subtract, multiply, and divide fractions and mixed numbers. Built for imperial measurements — handles 16ths, 32nds, and 64ths.
Material Calculators
Concrete and lumber — enter your dimensions, get the quantity you need. In the units you actually buy.
Construction Math
Board feet, square footage, cubic yards, linear feet. Convert between units instantly. No formula lookups required.
Angles & Slopes
Roof pitch, rafter length, stair rise and run, baluster spacing. Enter what you know, CutOnce calculates the rest.
Built for the job site.
CutOnce was built by people who got tired of doing construction math the hard way. Every calculator is designed around real tasks — not textbook problems.