The Caliper Pro

iPhone / Utilitaires

Caliper Pro is a professional-grade construction calculator built for trim carpenters, finish carpenters, millwork installers, and custom woodworkers.

Four precision tools. One fractional tape keyboard. Zero guesswork.

LINEAR LAYOUT ENGINE
Enter an opening height, number of faces, and gap size. Get equal-division face heights and zero-point tape pull marks — ready to transfer directly to your tape. Visual diagram included.

Precision toggle: work in 1/16, 1/32, or 1/64 fractions. Fat/lean indicators show exactly which direction the rounding went so you can compensate on the cut.

COMPOUND ANGLE SOLVER
Input wall angle and spring position. Get miter and bevel angles instantly — no trig tables, no guessing. Verified against industry-standard formulas. Gyroscope support for reading angles directly from your device.

MATERIAL YIELD PLANNER
Enter your sheet dimensions, part sizes, and kerf thickness. The nesting algorithm places parts with labeled positions (P1, P2…), flags impossible cuts before you start, and generates a cut list. Pinch to zoom the layout.

LUMBER VOLUME CALC
Board footage with adjustable waste factor. Enter price per board foot and get total material cost instantly. Exact values — no rounding surprises.

FRACTIONAL TAPE KEYBOARD
Purpose-built for construction input. Tap fraction buttons instead of typing decimals. Smart Convert turns any decimal into the nearest fraction at your chosen precision. Tape Measure Mode for fast entry.

PROJECTS & PDF EXPORT
Save any calculation to a project and room. Organize your work by job. Export a complete PDF job ticket with all rooms and calculations — ready to hand off or print on site.

BUILT FOR THE FIELD

Works offline, no internet required
Dark interface reduces glare on the jobsite
No ads, no subscriptions, no data collection


Caliper Pro replaces the scrap-paper math. Get it right the first time.