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Ladder Angle Calculator
Calculate safe ladder angle, base distance, and OSHA 4-to-1 compliance
OSHA Safety Standard (4-to-1 Rule): For every 4 feet of vertical height to the upper support point, the ladder base must be placed 1 foot away from the wall. This creates an ideal angle of approximately 75.5° from the ground.
Height & Ladder Parameters
Calculation Results
⚠️ Always secure the top and bottom of extension ladders on stable, level ground. Never use a ladder outside the safe 75° to 78° angle range to prevent slipping or tipping.