Carpenter Pro Calc

Built in 2026, not 2012. Carpenter is the trade calculator for carpenters, framers, roofers, and remodelers who are tired of plastic-calculator emulators, ads mid-job, and per-trade upsells.

One-time $14.99. Full Pro toolkit. All IRC editions. Forever.

FREE CALCULATORS • Feet-Inch Calculator — fractional math (5'4 1/2" + 3'7 3/8") with configurable precision (1/2, 1/4, 1/8, 1/16, 1/32) • Unit Converter — Length, Area, Volume, Temperature, Weight, Pressure (ft↔m, in↔mm, ft²↔m², yd³↔m³, °F↔°C, lb↔kg, psi↔kPa) • Area Calculator — rectangle, triangle, circle, trapezoid • Roof Pitch Calculator — rise/run ↔ angle ↔ slope %

PRO CALCULATORS — $14.99 one-time (V1.0) • Stair Calculator — total rise/run, treads, IRC R311.7 layout, feet-inch fractions • Rafter Calculator — common, hip, valley, jack, ridge cut, birdsmouth, tail cut, plumb/bevel • Material Estimator — board feet, lineal feet, sheet goods, waste • Concrete Slab — yards, 60lb/80lb bags, rebar grid, expansion joints • Framing Layout — wall studs (16/19.2/24 OC), plates, blocking, header sizing per IRC R602 • Tile Layout — area + grout joint + waste, per-box, layout offset • Roof Coverage — squares, bundles, ridge cap, drip edge, underlayment

REFERENCE TABLES • IRC R602 — stud spacing • IRC R311 — stair geometry • IRC R905 — roofing material reference • Lumber dimensions (nominal vs actual)

WHY CARPENTER?

• No ads. Ever.
• No accounts. No sign-in.
• All IRC editions included — 2018, 2021, 2024 (no future upsell)
• No subscription required — $14.99 once, forever
• 7-day free trial of Pro
• 100% offline — no signal needed on the jobsite
• Dark mode + glove-friendly tap targets
• Universal — iPhone + iPad in one purchase

Same pricing model as Conduit — our sister electrician calculator. You buy it once, you own it forever. That's the deal.

— LEGAL — Privacy Policy: https://panxiang1017.github.io/StaticPage/privacy-policy.html Terms of Use (EULA): https://panxiang1017.github.io/StaticPage/terms-of-use.html