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How loud is an angle grinder?

An angle grinder is typically around 100 dB — comparable to a jackhammer at 15 m. That falls in the “extremely loud” band, with a safe unprotected limit of about 15 min.
0 dB3570105140 dB
Typical level
100 dB
Category
Extremely loud
Vs conversation
16.0× louder
Safe limit
15 min

People search “how loud is an angle grinder?” for two reasons: curiosity about the number, and a practical worry about whether it is doing damage. Here is both — the typical level, what it feels like next to sounds you know, and what to do about it.

What 100 dB actually feels like

100 dB is extremely loud and genuinely hazardous. Safe exposure is measured in minutes, not hours, and without protection cumulative damage can begin quickly. Any regular activity at this level — power tools, concerts, motorsport — calls for rated hearing protection every single time. In the specific case of an angle grinder, the figure depends a lot on distance and the exact source: measured close up it can be several decibels higher, and across a room several decibels lower. Treat 100 dB as a representative, real-world value rather than a fixed constant.

Hearing protection

For anything above 85 dB, rated protection matters. Look at the NRR (US) or SNR (EU) figure — real-world reduction is roughly (NRR − 7) ÷ 2.

Electronic ear muffs (NRR 22–25)Shooting, mowing — amplify speech, block bangsLink coming soon
Reusable filtered earplugs (NRR 20)Concerts & musicians — flat attenuationLink coming soon
Foam earplugs (NRR 32)Sleep, travel, DIY — highest raw NRRLink coming soon

As an affiliate we may earn from qualifying purchases. This never changes our data or recommendations.

Is an angle grinder dangerous?

At 100 dB, an angle grinder can damage hearing with prolonged exposure. Limit unprotected exposure to about 15 min, and use rated protection for anything longer. Damage at this level is painless and permanent.

Hearing protection

For anything above 85 dB, rated protection matters. Look at the NRR (US) or SNR (EU) figure — real-world reduction is roughly (NRR − 7) ÷ 2.

Electronic ear muffs (NRR 22–25)Shooting, mowing — amplify speech, block bangsLink coming soon
Reusable filtered earplugs (NRR 20)Concerts & musicians — flat attenuationLink coming soon
Foam earplugs (NRR 32)Sleep, travel, DIY — highest raw NRRLink coming soon

As an affiliate we may earn from qualifying purchases. This never changes our data or recommendations.

An angle grinder vs other everyday sounds

SoundLevelCompared to an angle grinder
A jackhammer100 dBabout the same
A leaf blower100 dBabout the same
A nightclub100 dBabout the same
A chainsaw105 dB5 dB louder
A circular saw105 dB5 dB louder
A dog barking95 dB5 dB quieter

How to reduce it

Distance is your first tool — every doubling of distance outdoors removes about 6 dB. Where you cannot move away, rated hearing protection is the answer: look for a high NRR (US) or SNR (EU) figure, remembering that real-world reduction is roughly (NRR − 7) ÷ 2. Our hearing-protection guide explains how to choose.

Frequently asked questions

How many decibels is an angle grinder?
An angle grinder is typically about 100 dB, though the exact figure varies with distance, model and conditions. That places it in the “extremely loud” band of the decibel scale.
Is an angle grinder bad for your hearing?
At about 100 dB, an angle grinder exceeds the 85 dBA action level. Safe exposure is roughly 15 min without protection, after which hearing damage can accumulate.
How does an angle grinder compare to normal conversation?
Normal conversation is about 60 dB. At 100 dB, an angle grinder is perceived as roughly 16.00× as loud and carries about 10000× the sound energy.
How can I make an angle grinder quieter?
Wear rated hearing protection when close to it, increase your distance (every doubling drops about 6 dB outdoors), and add absorbing or blocking material where possible.

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Sources & accuracy. Reference levels are drawn from published data by NIOSH, OSHA, the CDC, the WHO Environmental Noise Guidelines and the American Speech-Language-Hearing Association (ASHA). Real-world readings vary with distance, room acoustics and the specific source, so treat every figure as a typical value rather than an exact constant. Last reviewed 2026-08-11.