Bosch Professional GLM 40-31 laser measure (IP65, shock-absorbing housing)

What it is and why people buy it

Bosch Professional’s GLM 40-31 is a laser distance measure aimed at day-to-day work where accuracy is useful, speed matters, and you don’t want to baby the tool. It’s the kind of device that gets pulled out for quick room measurements, planning layouts, or checking distances on site without needing a tape measure every time.

On paper, its appeal is pretty straightforward: it combines a bright colour display for easy reading, seven measuring modes for different situations, and automatic calculations for length, area and volume. Add the IP65 water and dust resistance and a shock-absorbing housing, and it’s clearly designed to handle the usual knocks and dust that come with practical use.

It’s not trying to be the most stripped-back budget model, and it may not be the best choice if you only measure occasionally at home. But if you’re using a laser measure regularly, the GLM 40-31’s workflow features (modes plus automatic calculations) are the sort of things that can save time and reduce mistakes.

Key features that actually affect your workflow

The biggest “day-to-day” difference here is how the GLM 40-31 reduces mental load. Instead of measuring a length and then manually calculating area or volume, it provides automatic calculations for length/area/volume. That’s handy when you’re dealing with tasks like estimating how much floor covering you need, checking the size of a space for materials, or preparing dimensions for a job.

You also get seven measuring modes. The entry level point for this is simple: more modes typically means you can adapt to more kinds of measuring tasks rather than forcing one method for everything. If you often find yourself switching between different scenarios, having those options can be a real convenience.

Then there’s the display. A bright colour display is one of those features you don’t fully appreciate until you’re outside in harsh light or working under imperfect lighting on site.

Worth noting: the listing mentions compatibility with a Li-ion battery and that it includes 2x AA LR6 1.5 V batteries, so the power setup is flexible. Still, if you’re expecting a single battery ecosystem only, you’ll want to double-check what battery type you plan to rely on day-to-day.

Tech specs

• Name: Bosch Professional GLM 40-31 laser measure
• Type: Laser distance measure
• Protection rating: IP65 certified (water and dust resistance)
• Shock handling: Shock-absorbing housing, supports drops up to 1.5 m onto concrete
• Measuring modes: 7 measuring modes
• Calculations: Automatic calculations for length, area and volume
• Display: Bright colour display
• Power: Li-ion battery compatible, included with 2 x AA LR6 1.5 V batteries

Pros, cons and what stands out

Strengths

• Built for rougher environments: IP65 certification plus shock-absorbing housing (rated for drops up to 1.5 m onto concrete) suggests it’s meant to survive real workplace treatment.
• Faster measuring-to-result flow: automatic calculations for length/area/volume can cut down on manual math.
• Easy to read while working: a bright colour display helps with visibility when conditions aren’t ideal.
• More measuring flexibility: seven measuring modes are useful when you’re not always doing the same kind of measurement.

Where you should be a bit cautious

• It may feel like overkill if you only measure rarely. If your laser measuring needs are occasional, you might prefer something simpler.
• Battery expectations can vary by user. The product is Li-ion battery compatible but includes AA batteries—fine for many people, but worth aligning with how you typically power your tools.
• No single listing detail about precision or range. If your work depends on specific performance ranges or tight tolerances, you’d want to verify those before committing.

Who it suits (and who should skip it)

It’s a good fit if you’re regularly measuring on site—think tradespeople planning spaces, checking dimensions during installations, or estimating areas/volumes as part of the job. The combination of automatic calculations and a readable display supports faster, more confident measurements.

It makes sense if you prioritise durability and day-to-day usability: IP65 resistance and drop tolerance matter when tools live in bags, get set down often, and share space with dust, debris, and the occasional awkward bump.

You may want to skip it if you only need basic distances occasionally and don’t care about multi-mode measuring or built-in area/volume calculations. In that situation, a simpler measure could do the job with less cost and less “feature overload”.

It might not be a great match if your workflow needs clearly defined specs like maximum range or very specific precision figures that aren’t stated here.

Getting the most from it (practical tips)

If you’re measuring a room for materials, the automatic area and volume calculations can be your quickest route. For example, measure a wall length, then use the area/volume options to avoid manual sums—particularly useful when you’re switching between a few rooms or want numbers you can write down immediately.

Also, take advantage of the seven measuring modes rather than forcing one approach. In practice, different angles and surfaces often call for different settings, and having options can reduce the chance of re-measuring.

Finally, don’t underestimate the display. In bright conditions or cluttered workspaces, being able to read the numbers clearly can stop measurement sessions from turning into guesswork.

In the box

The listing states the pack includes: GLM 40-31 Professional, a bag, 2 x AA LR6 1.5 V batteries, a manual, and a quick start guide.

Should you buy it?

If you want a rugged laser measure with IP65 protection, shock-absorbing housing, and automation for length/area/volume calculations, the Bosch Professional GLM 40-31 is worth considering. It’s the kind of tool that fits busy workplaces where you need speed, readability and a bit of resilience.

However, it may not be the best choice if you only measure occasionally or if you’re selecting based on performance specs that aren’t provided in this information (like maximum range or precise accuracy figures). In that case, it’s smarter to confirm those details first.

For many trades and on-site users, though, this GLM 40-31 looks like a practical, feature-led upgrade over a more basic distance-only approach.

Mini FAQ

Does it include batteries?

Yes. The pack includes 2 x AA LR6 1.5 V batteries.

Is it protected against dust and water?

Yes. It’s described as IP65 certified for water and dust resistance.

Can it handle drops?

According to the listing, it supports drops up to 1.5 m onto concrete, thanks to a shock-absorbing housing.

Can it calculate area and volume automatically?

It includes automatic calculations for length, area and volume.

Is it compatible with Li-ion batteries?

The listing says it’s Li-ion battery compatible, and it’s also supplied with AA batteries in the box.