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How loud is a lawn mower?

A lawn mower is typically around 90 dB — comparable to a petrol lawn mower. That falls in the “very loud” band, with a safe unprotected limit of about 2.5 hours.
0 dB3570105140 dB
Typical level
90 dB
Category
Very loud
Vs conversation
8.0× louder
Safe limit
2.5 hours

People search “how loud is a lawn mower?” 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 90 dB actually feels like

90 dB is in the risk zone. It is at or above the 85 dBA action level used by NIOSH and OSHA, which means exposure time now matters: the louder it gets, the shorter the safe dose. Hearing protection is recommended for sustained exposure, and the damage — when it happens — is painless and permanent. In the specific case of a lawn mower, 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 90 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 a lawn mower dangerous?

At 90 dB, a lawn mower can damage hearing with prolonged exposure. Limit unprotected exposure to about 2.5 hours, 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.

A lawn mower vs other everyday sounds

SoundLevelCompared to a lawn mower
A motorcycle90 dBabout the same
An air compressor90 dBabout the same
A blender85 dB5 dB quieter
A dog barking95 dB5 dB louder
A hair dryer85 dB5 dB quieter
A power drill95 dB5 dB louder

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 a lawn mower?
A lawn mower is typically about 90 dB, though the exact figure varies with distance, model and conditions. That places it in the “very loud” band of the decibel scale.
Is a lawn mower bad for your hearing?
At about 90 dB, a lawn mower exceeds the 85 dBA action level. Safe exposure is roughly 2.5 hours without protection, after which hearing damage can accumulate.
How does a lawn mower compare to normal conversation?
Normal conversation is about 60 dB. At 90 dB, a lawn mower is perceived as roughly 8.00× as loud and carries about 1000× the sound energy.
How can I make a lawn mower 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.