Slope Calculator

Convert slope among rise and run, percentage, and degrees without confusing 10% with 10°.

Percent, degrees, and ratio

Percent compares rise with horizontal run. Angle uses the arctangent of that ratio, so 10% and 10° are not the same.

Slope % = rise ÷ run × 100; degrees = atan(rise ÷ run)

Start with rise/run, percent, or degrees. Rise and run share one unit selector; a 1:10 ratio gives 10% and approximately 5.71°.

What does a 1:10 slope mean?

One unit of vertical change for every ten horizontal units.

Can a slope be negative?

Yes. A negative value represents a descending direction.

Does this design ramps or roofs?

It converts geometry; safety and code requirements must be checked separately.