Feet Inch Fractions Calculator
Tape Measure, Stairs & Rafters
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Enter feet, inches and fractions as you measure. Keep the calculation on your tape; use Pro when you need to save measurements to a job.
Onsite Math is a tape measure calculator for feet, inches and fractions. Add, subtract, multiply and divide job dimensions exactly, down to 1/64 inch, with metric shown alongside.
FREE, NEVER LOCKED: the feet-inch-fraction calculator and unit converter. PRO offers monthly, yearly or lifetime access. No ads, no account. Works offline.
CALCULATE LIKE YOU MEASURE
• Add, subtract, multiply and divide feet, inches and fractions such as 7 7/8
• Choose precision from 1/2 to 1/64 inch; decimal inches and decimal feet work too
• See mm, cm, m and decimal feet at the same time; area in ft² and yd², volume in ft³ and yd³
• A running tape that is kept between launches and can be saved to a job
• Calculator memory: M+, M− and MR
TRADE TOOLS
• Stair layout: risers, treads, total run, stringer length, headroom and stairwell opening
• Roof pitch, rise and run, angle and diagonal, plus common rafter length, overhang and birdsmouth cuts
• Equal spacing for balusters, pickets and posts
• Miter and compound crown molding angles
• Board feet and repeat cuts, circle and arc, architectural and metric plan scale
• Concrete (choose your bag size), drywall, tile, paint, lumber, roofing, block and rebar estimates with waste allowance, your currency and a cost per bag, sheet or piece
• Fractions like 7 7/8 are accepted in every tool field
BUILT AROUND REAL JOBS
Save any result from any tool to a named job, keep a material takeoff and export a PDF job report with the material purchase list for your client, crew or records. Job data stays on your device.
FLEXIBLE PRO ACCESS
Choose a monthly or yearly auto-renewing subscription, or buy lifetime access once. Restore purchases on your other iPhone and iPad with the same Apple Account.
Always verify measurements, structural requirements, codes and material specifications before ordering or cutting.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Any free trial on annual Pro is shown only to eligible customers. Before you confirm, the App Store shows the trial length and annual renewal price. Monthly and Lifetime do not include a free trial.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
New tools for saved jobs: editable room surveys, stock cutting plans with blade allowances, and measurement photos with labels and notes in PDF reports. Review all measurements before ordering or cutting.
The developer, EUTOPIX LABS, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Eutopix Labs P S A
- Size
- 13.8 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
English and 10 more
- English, Arabic, French, German, Hindi, Italian, Polish, Portuguese, Simplified Chinese, Spanish, Turkish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Pro Monthly $3.99
- Pro Annual $19.99
- Onsite Math Pro — Lifetime $59.99
- Copyright
- © 2026 Eutopix Labs P.S.A.

