Measure Tilt with a Phone or Manual Dial
This page is for real-world tilt, not measuring a picture. Open it on a phone or tablet and place the device on a surface or against an edge. Supported mobile browsers start the sensor automatically when allowed; browsers that require motion permission show an Enable Sensor button first.
Desktop browsers and locked-down mobile browsers still have a useful manual mode. Enter a value, move the slider, use the wheel on the dial, or switch between horizontal, vertical, front-back, and left-right modes to explain inclination without relying on a sensor.
How to Use the Phone Angle Meter
- Choose a mode that matches the placement: horizontal for a surface, vertical for an edge, front-back tilt for the top and bottom of the phone, or left-right tilt for the side edges.
- On supported mobile browsers, the sensor starts automatically. If the browser requires motion permission, tap Enable Sensor and respond to the browser prompt. If permission is denied, manual mode remains available.
- Keep the device still before using Calibrate Zero. Hold freezes the displayed reading for copying or discussion, while Reset stops the sensor and clears the temporary offset.
Sensor and Privacy Notes
- The page requests motion data on supported mobile browsers when the tool loads, or after Enable Sensor is pressed when a browser requires an explicit user gesture.
- Raw sensor values are not sent to a server, stored in localStorage, or included in share links.
- Software calibration only creates a relative zero for the current session and does not make the phone a certified instrument.
- Phone cases, uneven surfaces, browser filtering, screen orientation, and sensor drift can affect the displayed tilt.
When This Tool Fits
- Checking whether a shelf, picture frame, desk, ramp model, or classroom object is roughly level.
- Explaining inclination and slope with a live dial during a lesson or quick demonstration.
- Holding a reading while another person records it or compares it with a visual angle measurement.
- Using manual mode to discuss a planned tilt on desktop when no mobile sensor is present.
What the Reading Can and Cannot Prove
Phone angle meter readings are convenient for learning, setup checks, and rough alignment, but they are not professional calibration results. Device sensors vary, browser APIs can be filtered, and a phone surface may not match the object exactly. Verify safety-critical construction, engineering, accessibility, medical, or compliance measurements with calibrated equipment.