Fraction Calculator: Feet Inch
Construction & Woodworking
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
The fraction calculator built for the jobsite. Add, subtract, multiply and divide feet, inches and fractions on a big, glove-friendly keypad — then switch to imperial or metric with one tap. Every answer is exact, right down to the sixteenth. Works completely offline. No account.
Stop doing tape-measure math in your head. Joist keeps a running tape of everything you calculate, so this morning's number is still there this afternoon.
FEET-INCH-FRACTION KEYPAD
- Enter feet, inches and fractions with fat, easy-to-hit buttons
- Add, subtract, multiply and divide measurements
- One-tap imperial to metric (mm) conversion
- Exact fraction math — no rounding drift, snaps to 1/16" or 1/32"
- A running history tape you can scroll back through
- Hi-vis themes for reading the screen in bright sun
JOBSITE SOLVERS
- Stairs — risers, riser height, treads, total run, stringer length and slope angle, with code-limit warnings
- Board feet — total board footage for any lumber order
- Rafters — rafter length, run, rise, pitch and cut angle
- Concrete — slab and tube/column yardage with a waste allowance
- Drywall — sheets needed for a room
- Flooring — boxes needed for any floor
Every solver ships with a clear, labeled diagram so you can see exactly what each number means.
BUILT FOR CARPENTERS, FRAMERS AND BUILDERS
Whether you're framing a wall, laying out a staircase, ordering lumber, pouring concrete, hanging drywall or estimating flooring — this does the fraction and material math so you don't have to. A modern tool for the trades: fast, readable in the sun, and honest about its numbers.
HONEST BY DESIGN
Results are estimates to help you plan and order material. Always verify against your local building code — this app is not a substitute for it.
PRIVATE AND OFFLINE
- Works with no signal, anywhere on site
- No account, no sign-up, nothing uploaded
- Your tape stays on your phone
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ — Privacy Policy: https://kanac.github.io/syanac-legal/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Improved compatibility and reliability across the fraction calculator, jobsite solvers, and history tape.
The developer, Anthony Chui, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Anthony Chui
- Size
- 40.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Pro Lifetime $24.99
- Copyright
- © 2026 Syanac