Stair Angle Calculator
Calculates the incline angle of a staircase from rise and run.
Lilu Baba's Stair Angle Calculator computes a staircase's slope angle from rise and run using basic trigonometry.
How to use this calculator
- Enter the staircase's total rise (vertical height).
- Enter its total run (horizontal length).
- The incline angle updates instantly.
Stair Angle (degrees)
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FAQ
Stair Angle Calculator — frequently asked questions
Most residential staircases fall between 30-35 degrees; steeper angles (up to ~45°) are common for space-saving stairs like loft ladders.
Angle = arctan(Rise ÷ Run), converted from radians to degrees.