Convert a percentage slope to degrees with the Percentage Slope to Degrees Calculator. Enter a grade percentage (like from a road sign or treadmill) and get the angle in degrees. Results update instantly as you type.
Percentage slope to degrees calculator
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Using the calculator
Enter the percentage slope of the object you'd like to convert. This might be listed on a sign or marker for something like a road, railway (known as grade or percentage grade), or as a configurable setting on a treadmill.
The calculator shows all slope formats: degrees, radians, decimal slope, and rise per 100 run. Use the toggle to switch to Degrees → Percent mode for the reverse conversion.
Formula for converting percentage slope to degrees
The formula starts with converting percentage slope to radians using the inverse tangent, then converts radians to degrees:
\text{radians} = \arctan(\text{percentage} \div 100)\text{degrees} = \text{radians} \times \frac{180}{\pi}