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Instant result
Enter the data and press the button to do the calculation.
Online Calculator
Percentage slope calculator
Enter the vertical rise and horizontal distance to find the slope as a percentage and in degrees.
Use the same unit for both distances.
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Local processing
The values are processed directly in your browser.
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Free
No registration, external API or subscription required.
Frequently asked questions
How is the percentage slope calculated?
Slope (%) = elevation difference ÷ horizontal distance × 100.
Does a 10% slope mean 10 degrees?
No. Percentage and degrees are different ways of expressing the inclination.
What units should I use?
Use the same unit for the vertical rise and horizontal distance.
Can a negative slope come out?
Yes. A negative elevation difference indicates a descent in the chosen direction.