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CalcWolf DIY Leiter-Winkel-Rechner
DIY

Safe Ladder Angle Calculator (4-to-1 Rule)

Calculate the correct ladder angle and base distance using the 4-to-1 safety rule. Prevent falls and injuries.

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

Die 4-zu-1-Regel

Pro 4 m Hoehe: Fuss 1 m von der Wand. Idealer Winkel: 75° (70-80° sicher). Zu steil (>80°): kippt nach hinten. Zu flach (<70°): rutscht weg. Leiterunfaelle sind eine der haeufigsten Unfallursachen in Deutschland.

Sicherheit

3-Punkt-Kontakt halten. Leiter 1 m ueber Zugang. Nie auf nassem/instabilem Boden.

⚡ CalcWolf Insight

The "belt buckle rule" prevents the most common ladder accident — overreaching. Your belt buckle should never extend past the side rails. If you need to reach further, climb down and move the ladder. This takes 2 minutes; a fall takes 2 months to recover from.

Frequently asked questions
Welcher Winkel?
75° = 4-zu-1 (1 m vom Mauer fuer 4 m Hoehe).
Leiter oder Geruest?
Ueber 2 m oder laengere Arbeiten: Geruest (sicherer).
✓ Math logic verified against primary sources → See our verification process
Kevin Glover
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 →
🐛 Report a Calculator Error
Found a bug or outdated data? Reports go directly to Kevin and are reviewed personally.