How Loud Is a Lawn Mower? Decibels Explained
In This Guide
How loud is a lawn mower? Loud enough to matter, is the short answer. Most gas mowers sit above the threshold where sustained noise starts doing permanent damage to your hearing, and because that damage is gradual and painless, almost nobody notices it happening. The numbers are worth knowing, because the difference between a gas mower and an electric one is far larger than it sounds.
Lawn Mower Noise Levels by Type
| Mower type | Typical noise level |
|---|---|
| Robotic mower | About 55 to 65 dB |
| Manual reel mower | Very quiet, mostly just the blades |
| Electric or battery mower | About 70 to 85 dB |
| Gas push mower | About 85 to 95 dB |
| Riding mower | About 90 to 100 dB |
| Commercial zero turn | Often 95 to 105 dB |
For a sense of scale, normal conversation is around 60 dB, a vacuum cleaner about 70, and heavy traffic somewhere near 85. A gas mower is comfortably louder than all of them.
The Decibel Scale Is Not What You Think
This is the part that catches people out. Decibels are logarithmic, not linear, so the gaps between the numbers are far bigger than they look.
That is why swapping a gas mower for an electric one makes such a striking difference in practice, even though the numbers only shift by fifteen or twenty.
When Does It Actually Damage Your Hearing?
The commonly cited threshold is 85 dB. Below that, sustained exposure is generally considered low risk. Above it, the risk accumulates, and the louder the sound, the faster it accumulates.
Two different standards are worth knowing. NIOSH, the research body, recommends a limit of 85 dB over eight hours, and halves the safe exposure time for every 3 dB above that. OSHA, the regulator, sets a workplace limit of 90 dB over eight hours and halves the time for every 5 dB. NIOSH is the more cautious of the two.
Does an Hour of Mowing Really Matter?
A single hour behind a 90 dB mower is not going to deafen anyone. The problem is that it is never a single hour. It is an hour a week for twenty or thirty years, plus the strimmer, plus the leaf blower, plus everything else, and the damage is cumulative.
Hearing protection while mowing is cheap, takes five seconds to put on, and is one of the easier decisions in this entire subject.
How to Make Your Mower Quieter
1. Check the muffler
A damaged, rusted, or loose muffler makes an engine dramatically louder. If your mower has suddenly got noisier, this is the first thing to look at.
2. Sharpen the blade
A dull blade tears at grass and makes the engine work harder, which raises both the load and the noise.
3. Tighten what is loose
Rattling deck panels and loose bolts add a surprising amount of noise, and a vibrating machine is louder than a smooth one.
4. Service the engine
A poorly running engine, whether from a blocked filter or a fouled plug, is a louder engine. A tune-up quietens things down.
5. Mow dry grass
Wet, heavy grass loads the engine, and a labouring engine is a noisy one.
A Sudden Increase in Noise Is a Warning Sign
Worth being clear about this. If your mower has become noticeably louder than it used to be, that is not just an irritation, it is a symptom.
Rather Have a Real Technician Handle It?
A Wildwood technician comes to your driveway, diagnoses the problem, and fixes it on the spot, usually in about an hour. More than 10,000 repairs completed since 2019, with flat rates quoted before we arrive so there are no surprises.