Fraction calculator · iPhone & iPad
Fraction math for people who measure.
Type it like you say it: 5 feet 3 and 3 eighths. Get answers you can mark on the board.
coming soon!
Free · No account · No tracking
How it works
Type it like you say it
One tap on /2, /4, /8, /16, /32 or /64 finishes a fraction. "and" separates the whole number.
Answers you can use
Mixed numbers first, decimal underneath, and the nearest 1/16″ mark when an answer falls between ruler marks. Tap to switch to improper or decimal.
Your History, always there
Every calculation is saved. Tap any past answer to use it again.
Cut list
34½ − ¾ toe kick
= 33 ¾″
15¾ − 3/16 − 3/16
= 15 ⅜″
8′ 2⅛″ ÷ 3
≈ 2′ 8 11/16″
↑ nearest 1/16 mark, so you can measure it
With CutMath Pro, save calculations like these into a named cut list for the job, and share it by text or email.
Built for the job site
- S-01Feet and inches together, or inches only
- S-02Chained math: × and ÷ happen before + and −
- S-03Length × length gives square feet, for flooring, drywall and decking
- S-04Big, easy-to-hit keys; keys that don't make sense right now are dimmed
- S-05Dark and light themes, haptic feedback, VoiceOver support
- S-06On iPad, History sits beside the keypad
Details
1 · the answer 
2 · typing it in 
3 · equal spacing 
4 · square feet 
5 · light mode 
6 · settings
CutMath Pro
One-time purchase. No subscription.
- Equal Spacing: split a board into equal pieces with the blade kerf, or space balusters and shelves evenly, with every mark to measure.
- Saved Cut Lists: save calculations into named lists like "Kitchen base cabinets" and share them by text or email.
- Metric Conversion: every length in millimetres and every area in square metres.
- Rounding Precision: round answers to the nearest 1/8, 1/16, 1/32 or 1/64 inch.
- Key Colors: Safety Orange, Blueprint Blue, Level Green and Chalk Red.
New Pro tools are included as they're added.
$4.99One-time · in-app · prices may vary by region
No account · No tracking
Your History stays on your device. Privacy Policy