Cutwise: Fraction Calculator

Do tape measure math in inches and fractions: 67 3/8 + 28 11/16 = 96 1/16. Includes a level, unit converter, and material calculators. Pay once, no subscription.

Cutwise is a measurement calculator built for people who work in inches and fractions all day. Three keypads — whole inches, numerator, and denominator . stay on screen at once, so entering 67-3/8" takes four taps, not a mode switch. Add 28-11/16", get exactly 96-1/16", and keep every step on a running history tape you can check back at the saw.

FRACTION CALCULATOR • Add, subtract, multiply, and divide inch-fraction measurements • Three always-visible keypads — no popup keyboard, no mode switching • Exact fraction math down to 1/64" — no rounding drift across chained cuts • Feet, millimeter, and centimeter readouts under every result • History tape: reuse, delete, and clear past calculations

SPIRIT LEVEL • Bubble level driven by your iPhone's motion sensors • Calibrate to any reference surface; the screen stays awake while you work • Slope, roof pitch, and plumb modes for layout and framing (Pro)

UNIT CONVERTER • Fraction-to-decimal in both directions, with reduced mixed-number results • Length free; area, volume, and angle conversions with Pro • Pulls your last calculator result in with one tap

MATERIAL CALCULATORS • Flooring and paint estimators, free • Drywall, concrete, stud layout, decking, and a cut-list optimizer (Pro) • Copy results or save them to projects so bids and cut lists stay together

FREE VS PRO The free version includes the full fraction calculator with history, the level, length conversion, the flooring and paint calculators, and project saving. Pro Lifetime is a single one-time purchase that unlocks the advanced level modes (slope, roof pitch, plumb), area/volume/angle conversion, the Pro material calculators, the cut-list optimizer, project export, and unlimited projects and history.

ONE-TIME PURCHASE. NO SUBSCRIPTION. Pay once, keep it forever. No monthly fee, no account, no login, no cloud sync you didn't ask for. Your measurements and projects stay on your device.

Cutwise is built by Ketchum Applied Technologies in Sun Valley, Idaho, and shaped by feedback from people who use it on real jobs. If a calculator you need is missing, tell us. The roadmap comes from the jobsite.