RAFTER Construction Calculator
Cut it right the first time
$19.99 · Designed for iPad. Not verified for macOS.
Pay once, own it forever. Feet-inch-fraction math, rafters, stairs, squaring and board feet — instant, offline, with the working shown on every answer.
The construction calculator apps tradespeople relied on for years now charge rent — $40 every year, forever, for the same math. Rafter is the alternative: pay once, own it forever.
Rafter does jobsite math the way you think it: feet, inches, and fractions — on a real keypad, with the working shown on every answer.
PAY ONCE. NO SUBSCRIPTION. NO ACCOUNT. NO ADS. WORKS OFFLINE.
FEET-INCH-FRACTION CALCULATOR
- Add, subtract, multiply, divide in feet-inches-fractions (1/8", 1/16", 1/32")
- Full dimensional math: length × length = area, area × depth = volume — straight to cubic yards
- Tap the display to convert: decimal feet, inches, yards, meters, centimeters, millimeters
- The honest ≈ mark: when a result can't land exactly on a fraction, Rafter tells you
RAFTERS — Common, hip/valley, and jack lengths from pitch and span. Plumb and level cut angles. Jack table at 12/16/19.2/24" OC. Pitch ↔ degrees ↔ percent, live. The framing-square per-foot number on every result so you can verify it yourself.
STAIRS — Total rise in, full layout out: risers, treads, total run, stringer length, and the stock board to buy. Code check against IRC defaults (editable) with clear pass/fail badges. Adjust riser count and watch everything recompute.
SQUARE & LUMBER — Diagonal squaring with out-of-square deviation. Board feet with cost, the way lumber is actually sold.
PAPERLESS TAPE — Every answer lands on the tape automatically. Recall any number with a tap. Star and label figures by job. Text or CSV the whole list to the contractor.
BUILT FOR THE JOBSITE
- Huge keys, extreme contrast, readable in direct sun
- Instant answers — no Calculate button, no spinner, no signal needed
- Siri & Shortcuts: ask for a rafter length or stair layout hands-free
- Your numbers never leave your phone. No data collection. Nothing to log into.
One price. Every future update included. That's the whole deal.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Aditya Wirayudha, 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
- Aditya Wirayudha
- Size
- 1 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.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Cilukba.com
