Measure Any Angle with Your Phone
A free tool that turns your phone into an angle finder. Read the tilt of any surface in degrees, slope percent, per-mille and roof pitch, or switch to clinometer mode to estimate the height of a tree or building from a known distance.
How to measure an angle
Open the tool on a phone and tap Start — iPhones ask permission to use the motion sensors.
Lay the phone flat on the surface, or hold it along the slope you want to measure.
The live readout shows degrees, slope, per-mille and roof pitch. Use Set zero for a relative angle and Hold to freeze it.
A digital inclinometer and clinometer in your pocket
Use your phone as an angle finder
This tool reads your phone's motion sensors to measure tilt. Tap below and allow motion access — the reading happens live in your browser.
Open this on your phone
An angle finder needs motion sensors, which desktop computers do not have. Open this page on a phone or tablet.
Lay the phone flat against the surface, or hold it along the slope. The reading updates live.
Stand a known distance from the object. Aim along the top edge of the phone at its base, capture, then aim at its top and capture.
