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