📐

Stair Calculators

Calculate stair dimensions, stringer lengths, rise over run, spiral staircases, and landings. Free stair calculators that meet IRC building code requirements.

Ad — 728x90 — Leaderboard

📐Free Stair Calculator — Steps, Rise, Run & Stringer (2026)

Free stair calculator — enter total rise for instant step count, riser height, tread depth & stringer length. Meets IRC building code.

📐Free Stair Stringer Calculator — Length, Count & Layout (2026)

Free stair stringer calculator — get stringer length, count & layout for any staircase width. Covers 2x10 & 2x12 stringers.

📐Free Rise Over Run Calculator — Slope, Angle & Ratio (2026)

Rise over run calculator — free slope tool. Get ratio, percentage, angle & description instantly. Works for stairs, ramps & roofs.

📐Free Spiral Staircase Calculator — Treads & Dimensions (2026)

Free spiral staircase calculator — enter diameter & floor height for tread count, rise per step & rotation. Meets building code.

📐Free Stair Landing Calculator — Flights & Dimensions (2026)

Free stair landing calculator — split flights with intermediate landing. Get steps per flight, landing height & total run.

📐Free Baluster Spacing Calculator — Count & Even Gaps (2026)

Free baluster spacing calculator — get exact count and uniform gap distance for deck and stair railings. Meets IRC 4-inch max spacing code.

Other Calculator Categories

🏛️ Foundation Calculators 🪵 Floor Framing Calculators 🔨 Wall Framing Calculators 🏠 Roofing Calculators 🧱 Exterior Shell Calculators 🔩 Insulation & Drywall Calculators 🔧 Hardware Calculators Finishing Calculators Outdoor Calculators Flooring Calculators