How To Use A Bosch Laser Level [Step By Step Guide]?

Do you have a new Bosch laser level, and do you want to know how to use it for your DIY projects? You’ve come to the right place, for we have researched this question, and we have the answer for you.

Here is a summary of the steps to use a Bosch laser level.

  1. Check the batteries of your Bosch laser level. Install new batteries if you need to.
  2. Mount the Bosch laser level on a tripod or on its mounting clamp.
    • When you mount the laser level on its mounting clamp, you need to mount the clamp on a level surface, a workbench, or on a ladder.
  1. Turn on the laser level.
  2. Position the laser level where you want the laser lines to appear.
  3. Wait until it automatically finds the correct level.
  4. Use the laser lines as a reference for whatever you need to install on the wall.

Let’s talk more about the laser level in the succeeding sections. Learn about the different ways that you can use your laser level in the sections below.

Read on!

What is a spirit level?

A spirit level, a bubble level, or a level is an instrument that carpenters use to determine if a surface is level or plumb.

Carpenter holding a spirit level on a work bench

The word level in the second sense above refers to how parallel a surface is with the horizon. The more level a surface, the closer it is to become parallel with the horizon. A surface cannot be perfectly parallel with the horizon because the horizon isn’t a straight line.

The word plumb, on the other hand, refers to how close or far a surface is to becoming perpendicular to the horizon. The more plumb a surface, the closer to 90 degrees it is with the horizon.

The most common spirit level tool is the tubular spirit level. This is a small cylinder of neon green liquid with a small bubble. Two lines bound the middle area of the cylinder.

What is a spirit level, How To Use A Bosch Laser Level [Step By Step Guide]?

When the bubble is at the center of these two lines, then the position of the tool indicates the level. When the cylinder is in a perpendicular position with a straight tool, you can use it to determine the plumb too.

What is a laser level?

A laser level employs a low-frequency—red or green—laser beam and projects it on a plane. You can then mount the laser beam projector on a tripod to keep it stable.

Laser building level with green beams

The development of this technology started in the 1960s, but the first design was patented only in the 1980s. Newer laser-level designs use an auto-leveling feature that allows the laser to automatically find the correct level when projecting the horizontal and vertical reference lines.

Further development of the technology allows more complex laser levels to project a laser plane instead of a simple line. Laser planes are like invisible level or plumb planes on your worksite that will mark a line on the walls, ceiling, and floor of a room where the plane intersects.

Thus, a laser leveling plane makes it easier and faster to work on large-scale projects.

The advantage of using a laser level is that it provides you with a level reference line that can project for hundreds of feet. This makes it more effective than a chalk line—which is dependent on a separate leveling tool for accuracy.

How to use a Bosch GLL 30 laser level?

Builder measures the repair lines using a green laser level,

Here are the complete steps to using the base Bosch laser level model.

  1. Unpack your Bosch laser level and check the package. Make sure that the contents of your Bosch package are complete.
  2. Unwrap the two AA batteries.
  3. Install the AA batteries into the Bosch laser level.
  4. Screw the laser level on the mounting device.
    • Alternatively, you can mount the laser level on a tripod that has a quarter-inch mounting plate. Some tripods that you use for cameras will also fit various Bosch laser-level models.
  1. Lock the mounting device on a stable surface. A work ladder, workbench, or a nearby post are good candidates for mounting the laser level.
    • The laser level will keep resetting its position (or blink if it cannot establish stability) if you set it on an unstable surface. If the surface keeps moving or shifting while you work, the laser level will keep resetting itself.
  1. Turn the laser level on.
  2. Adjust the position of the laser to where you want it to project the laser and wait for it to complete leveling. The laser level will take three to four seconds to complete auto leveling.
    • All of Bosch’s laser levels have an auto-leveling feature. They have an internal mechanism that will automatically find a level position for the laser lens and project a level laser.
    • Make sure that the laser level is not moving or vibrating.
    • It will blink every few seconds if it is interrupted (by movement or vibration) while auto-leveling.
  1. Once the leveling is complete, you will have straight vertical and horizontal lines on the wall that you can use as a reference for whatever you would like to install on the wall.

Bosch Laser Level Additional Features

Red Laser level turned on in a dark room

The most basic feature of Bosch’s laser levels is the crossline laser that provides a level and plumb reference for mounting on walls. Different models have additional features as the models become more expensive.

The Bosch GLL 30 has the standard red crossline laser and the auto-leveling feature. Its power switch also serves as a lock for the auto level pendulum inside so that the laser will not move and hit the walls of the level when you travel with it. Turning off the GLL 30 will also lock the laser in place.

BOSCH GLL30 Self-Leveling Laser Level is available on Amazon through this link.

Bosch GLL 40-20G

This model is the same as the GLL 30 except for the color of the laser. The GLL 40-20G uses a green laser which is brighter than the red laser of the GLL 30. A green laser projects a little farther than a red laser because it is brighter.

Bosch GLL40-20G is available on Amazon through this link.

Bosch GLL75-40G

The GLL75-40G also uses the same green laser technology, albeit more powerful. Its green laser is up to 4X brighter than a red laser, making it project up to 100 feet away.

Additionally, there is a top button that allows you to activate the horizontal laser, the vertical laser only, or both. Pressing the same button will allow you to cycle between the different projection modes. It will project the crossline laser by default.

The power switch is also a three-way toggle. You get the “Off” position that locks the laser in place, the standard “On” position, and the locked pendulum position. The third option allows you to turn off the auto-leveling feature. When the auto leveling feature is off, you can set the GLL75-40G to work at any angle, giving you a reference plumb and level reference at any angle.

BOSCH GLL75-40G is available on Amazon through this link.

Bosch GLL3-300

The GLL3-300 makes use of a red laser. However, its laser can project up to 200 feet.

Additionally, it projects a 360-degree vertical and horizontal laser level.

The GLL3-300 provides two vertical 360-degree laser planes and one horizontal 360-degree plane. The leveling plane projects the laser from the walls to the ceiling and to the floor.

This is useful for installing something on your walls that need to be level across the walls, ceiling, and floor of a room.

It uses the same three-way toggle switch for power and locking the auto-leveling feature.

It also has a button that you can use to select to activate the horizontal leveling plane, the vertical leveling plane only, two vertical leveling planes, or all three—two vertical planes and one horizontal plane. Press the button to cycle between the mode that you prefer.

Bosch GLL3-300 is available on Amazon through this link.

Bosch GLL3-330C

The GLL3-330C has all the features of the GLL3-300—including the red laser beams.

In addition, you have the option to use the rechargeable lithium-ion battery that comes with it or AA batteries. There is an AA battery adapter that you can use for regular AA batteries when you’re still charging the lithium-ion battery.

Additionally, you can connect the GLL3-330C to your smartphone via Bluetooth. Download the free Bosch leveling remote app to access the features of the GLL3-330C on your smartphone and control it remotely. The app will also inform you if there is an accuracy problem through the CAL Guard technology.

Bosch GLL3-330C is available on Amazon through this link.

CAL Guard Technology

CAL Guard is a self-monitoring technology that is present in some of Bosch’s laser-level tools. It monitors the tool for any situation that could affect its accuracy.

Possible situations that can affect the accuracy of the tool include extreme temperatures, impacts, and extended use.

The CAL guard will alert you through your smartphone to inform you of these risks to the accuracy of the tool. You can then decide to perform actions that will mitigate the risks affecting the tool’s accuracy.

Bosch GLL3-330CG

The Bosch GLL3-330CG is the Bosch GLL3-330C but with a green laser this time.

Bosch GLL3-330CG is available on Amazon through this link.


Using the Bosch laser level is the same across different models. Additional features to the base features are easy to use.

If you found this article interesting, why not check the two articles below too:

How To Level An Uneven Concrete Floor In 4 Steps?

Does A Floor Have To Be Level For Laminate Flooring?

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