DIY

Staircase Calculator

Built by Kevin Glover · @gloverbuilds · Verified formula

Calculate stair rise, run, and number of steps from floor-to-floor height. Code compliant. Free calculator.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

In this article

How to Use This Calculator
Tips for Best Results

Dimensões

Espelho (altura do degrau): 16-18 cm. Piso (profundidade): 25-32 cm. Fórmula de Blondel: 2×espelho + piso = 60-65 cm. Número de degraus = altura total ÷ espelho. Para 2,70 m: 270÷17 = ~16 degraus de 16,9 cm. No Brasil, a NBR 9077 rege escadas de edificações.

Largura

Residencial: mínimo 80 cm. Comercial: 120 cm. Prédios: conforme NBR 9077. Corrimão obrigatório em um lado (residencial) ou ambos (comercial).

⚡ CalcWolf Insight

Inconsistent riser heights are the leading cause of stair falls. Building code limits variation to 3/8 inch because even tiny inconsistencies trip people — your foot expects every step to be identical.

Frequently asked questions

Quantos degraus para 2,70 m?▾

15-16 degraus. 270÷17 ≈ 16 degraus de 16,9 cm.

Dimensões padrão?▾

Espelho: 16-18 cm. Piso: 25-32 cm. Largura: 80 cm mínimo residencial.

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Kevin Glover · @gloverbuilds

Founder, CalcWolf · GLVTS · Blickr

All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →