Digital Spirit Levels for Flooring: GL60 or GL120?

Flooring creates two different measuring jobs: checking the surface directly and establishing a reference through the room. A digital spirit level is strongest at the first one.

What a digital level actually tells you

A digital level measures the angle of the surface it is sitting against. That can make small deviations easier to interpret than a bubble alone, but it does not automatically tell you whether an entire subfloor meets the tolerance required by the flooring system.

Always use the installation specification for the floor you are laying and the measurement method it requires.

GL60 or GL120?

The Grettz GL60 is 600mm long, making it easier to use around thresholds, stairs and tighter areas. The GL120 gives you a 1200mm physical reference, which is more useful when you want to check over a longer section of floor.

Where a laser fits

A laser can establish a repeatable reference across a wider room. It does not replace a straightedge or physical level for checking the surface directly. For flooring work, the two approaches often complement each other.

Do you need digital?

Not necessarily. If a conventional spirit level or specified straightedge gives you the information the job requires, a digital display is an extra convenience rather than a requirement.

The bottom line

Choose the GL60 when access and portability matter; choose the GL120 when a longer physical reference is more useful. Most importantly, separate “is this surface locally level?” from “does this floor meet the required flatness or installation tolerance?”

Read next

Our flooring laser guide explains layout versus flatness, while Which Laser Level Do I Actually Need? covers lasers and physical levels together.