Three methods
| Method | Good | Not so good |
|---|---|---|
| String and weight | Checks verticals with no tools | Horizontal needs another step |
| Spirit level | Most accurate; a must for shelves | Many homes do not have one |
| Smartphone | Always with you; shows degrees | Not as accurate as a tool |
For a frame on a single nail, a phone is often enough. For a shelf that will hold books or a heavy mirror, check with a spirit level. To see what an angle means in length, use the tilt conversion table.
Standing the phone on the frame
The level line in the Android app "Level Camera" measures left-right tilt with the phone standing upright.
Level only, phone upright
In Capture settings, turn on Level only. Stand the phone upright in portrait with its bottom edge on the top of the frame. Just steady it against the wall with a fingertip; pressing changes the reading.
Turn the frame until it goes green
Nudge the frame in the direction that makes the number smaller. With the tolerance tightened to about ±0.5°, green means quite level. A short buzz tells you when you are there.
Checking high frames with a photo
You cannot put a phone on a frame above a staircase. Instead, take a level photo of it, straight on, and look at the frame in the photo.
- Stand in front of the frame, as close to its height as you can (shooting steeply upward turns its edges into a trapezoid).
- Shoot when the level turns green.
- Compare the top edge of the frame with a horizontal grid line. The photo is level, so if the edge and the grid disagree, the frame is tilted.
Hanging several frames
- Decide first whether to align the top edges or the center line. With mixed sizes, a shared center line looks less ragged.
- Do not use baseboards or ceiling lines as a reference. In older homes they are often out of level.
- When you are done, send a straight-on photo to the family chat so whoever could not be there can check it too.
FAQ
Can I do this with a TV or a mirror?
If you can stand the phone on top, it works as a check. Wall bracket installation itself should be checked with a spirit level.
I want to check my phone first.
Run the 180° flip test to confirm the phone-side error is small.
Level Camera
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