Unit converters
Works in your browser. Nothing is uploaded.Slope converter
Degrees to percent, ratio (1 : n), per mille and roof pitch (inches in 12), both ways.
°
Percent
–
A 100 % slope is 45°. A level surface has no ratio, so 1 : n shows a dash.
- Degrees–
- Percent–
- Per mille (mm/m)–
- Ratio (1 : n)–
- Pitch (inches in 12)–
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How to use it
- Type the value
The number you have, like 5 for a 5° slope.
- Pick its unit
Degrees, percent, per mille, ratio 1 : n or pitch in 12.
- Read or copy
Every other unit follows. Tap copy beside the one you need.
Tips
- Percent is not degrees
A 100 % slope rises as much as it runs: that is 45°, not 90°.
- Ramps
A 1 : 12 ramp is 8.3 % or 4.8°.
- Measure it
Lay your phone on the surface with the bubble level to read its slope.
In the app
Unit converter in Angle Meter
- Slope and angle from the phone’s tilt
- Every unit of a kind on one screen
- Pinned unit pairs and a conversion list
- Voice commands
Get it onGoogle PlayComing soon to the App Store
Unit converter guide ›