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How to Measure Height with Your iPhone (People, Trees, Buildings)
AR height measurement uses the ground plane plus your phone's position to calculate vertical dimension. Works on people, trees, and buildings up to ~30 m.
Apple's Measure app auto-detects people's height. Third-party AR apps extend this to any vertical object. Here's how it works and when accuracy degrades.
왜 측정하나
- Person's height for ordering custom clothes or harness
- Tree height for safety / pruning planning
- Building height for solar / signage
- Ceiling height (alternative method)
준비물
- iPhone with Ruler AR
- Height mode
- Level ground for accuracy
단계별 안내
- Stand on level ground. AR Height needs a flat reference plane. Stand on level ground, not sloped, not stairs.
- Open Height mode. In Ruler AR, switch to Height. The app projects a line on the ground at your phone's position.
- Tap the base. Aim at the base of the object (where it meets the ground). Tap to anchor.
- Aim at the top. Tilt the phone upward, keeping the on-screen crosshair on the top of the object. Tap to capture.
- Read the height. The reading appears in your chosen unit (cm, m, ft). Accuracy: ±5% under 10 m, ±10% over.
팁
- For trees, measure from outside the drip line for cleanest base detection
- For buildings, very tall (>20 m) measurements degrade, use a laser tape for precision work
흔한 실수
- Sloped ground, AR ground plane gets confused
- Aiming above the object's actual top, picks up background
자주 묻는 질문
Can iPhone measure my own height?
Yes, point the camera at yourself in a mirror, or ask someone to point it at you. Apple Measure auto-detects.
How accurate is AR height vs a tape measure?
Within ±5% for under 5 m. Worse over distance, at 10+ m use a laser distance meter.