Pitchwright Framing Calculator

For carpenters framing roofs and stairs on the job: Pitchwright works like a handheld, offline, on the phone you already carry. Rafters, hips and stair stringers come out right first time, in feet-inch or metric, without buying an $80+ handheld.

Built for carpenters, framers, roofers, deck builders and remodelers, it also covers board feet, studs, sheets and concrete. It works like a hardware calculator: a green chassis, real keys and a clear LCD, with each answer labelled so you know what you are reading. Enter dimensions the way you read them off the tape, in feet, inches and fractions or in metric.

ROOF FRAMING

• Rise, run, diagonal and pitch: enter any two and solve the rest

• Pitch as x in 12, or from an angle in degrees

• Common rafter length, less half the ridge

• Plumb and level cut angles

• Regular hip or valley length, hip run and hip plumb angle

• Jack rafters at 16, 24 or any spacing, each step shorter by the common difference

• Rafter tail from the overhang, and the rafter with tail

STAIRS

• Riser count, riser height, tread count and tread depth from the total rise

• Total run, stringer length, stair angle and the 2R + T check

• Set a desired riser or a fixed tread

• Limits from the US residential code (IRC) or the Dutch building code, with a warning when a tread falls short

LUMBER AND MATERIALS

• Board feet from thickness × width × length, or cubic metres

• Stud count for a wall at the stored spacing

• Whole 4 x 8 sheets, roofing squares and 8 x 16 blocks for an area

• Concrete volume in cubic yards, cubic feet and cubic metres, and bags of 80, 60 and 40 lb (25 kg in metric) with a waste allowance

TRIM AND LAYOUT

• Crown moulding miter and bevel for 38 and 45 degree spring angles, at any corner

• Circles: diameter, circumference and area

• Polygon side length and miter for 3 to 64 sides

• Arcs and arches from a chord or angle: arc length, height and radius

WORKS THE WAY YOU DO

• Feet-inch-fractions, and millimetres and metres throughout

• A results strip shows every solved value at once

• 10 memories, a tape of your calculations, reference tables and a key guide

• Large keys you can hit with gloves on

• Export a job strip: the tape with inputs, stamped and ready to attach to a lift plan, sign-off or take-off, as text or PDF

TRY PRO FREE FOR 7 DAYS

Try every feature free for 7 days, then keep Pro with a yearly subscription. Cancel anytime in Google Play. No ads, works offline.

PRIVATE BY DESIGN

Works offline, no account, no data collected. Everything stays on your device.

How it's calculated: the formulas and tables behind every result, at https://wrightcalc.app/pitchwright/

Questions or feedback: support@wrightcalc.app

Results are computed from the formulas shown for each function and are provided for reference only. Verify all dimensions before cutting or building, and confirm stair and structural requirements against the code in force and the authority having jurisdiction. The developer accepts no liability for loss or damage arising from use.