Measure a wall from a photo

Stick a blank A4 sheet on the wall, take one photo of the whole wall, confirm the page and the wall. Nothing leaves this page.

  1. Stick a blank A4 sheet flat on the wall. Any page from the printer tray.
  2. Photograph the whole wall, corner to corner, lights on. Main camera, not the wide-angle.
  3. Confirm the page, confirm the wall. The app outlines both; drag a corner if one is off. Doors and windows it can see are listed.
  4. Save the wall. Next wall. No page? Tap the corners and use a door or the ceiling height.