How to use a laser level to check a floor level

Written by greyson ferguson
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How to use a laser level to check a floor level
Find the level of your floor. (carpenters level image by Richard Seeney from

A laser level, in addition to having the small level bubble in the middle of the item, shoots a laser from both ends of the level. This allows you to accurately measure the height of your walls and the floor without moving a standard level over every few feet on your floor. In order to accurately measure the level on your floor and walls you just need to inspect the level of each side of the floor.

Skill level:
Moderately Easy

Things you need

  • Laser level
  • Pencil
  • Ruler

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  1. 1

    Press the "On" button on the laser level and red laser emits from each end of the level.

  2. 2

    Place the laser level against one of the walls, equidistant from each of the walls perpendicular to the laser level. The lasers extend to the perpendicular connecting walls. Look at the level bubble in the middle of the level. This should be directly in the middle. If it isn't, your floor is off level.

  3. 3

    Mark off where the laser hits the opposite wall with a pencil, then measure the distance from the floor to the mark. Compare this to the opposite wall. You want this to be the same.

  4. 4

    Repeat the process for each wall to determine what sides in the floor are not level.

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