What is a 1:12 slope ratio?

A 1:12 ratio means 1 unit of rise for 12 units of run, about 4.76° or 8.33% grade.

What slopes are ADA compliant?

The ADA requires ramps to be 1:12 or less (8.33% or about 4.8°) for wheelchair accessibility.

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Convert between all angle units instantly with accurate results, formulas, and reference tables.

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Common questions about the Slope Angle Converter

Use: angle = arctan(percent/100). For example, 100% slope = 45°.

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