Decibel Levels by Mower Type
| Mower Type | dBA (at operator) | Safe Exposure |
|---|---|---|
| Robotic mower | 55–65 dBA | Unlimited |
| Electric push mower | 70–80 dBA | 8+ hours |
| Gas push mower | 85–90 dBA | 2–8 hours |
| Gas riding mower | 90–95 dBA | 1–2 hours |
| Commercial zero-turn | 95–100 dBA | 15 min–1 hour |
For context, 85 dBA is roughly as loud as heavy city traffic. A gas push mower at 88 dBA is safe for about 4 hours of continuous exposure according to NIOSH guidelines — which means a typical 1–2 hour mowing session is within limits, but barely. If you mow professionally or use a louder riding mower, you're likely exceeding safe exposure every time.
The 85 dBA threshold: NIOSH recommends hearing protection for any noise exposure above 85 dBA. Gas lawn mowers sit right at or above this line. Even if a single mowing session doesn't cause immediate damage, cumulative exposure over years of weekly mowing adds up.
Do You Need Hearing Protection?
For gas mowers: yes. Foam earplugs (NRR 25–33) or over-ear muffs are inexpensive and reduce exposure by 15–25 dB, bringing a 90 dBA mower down to a comfortable 65–75 dBA at your ear. This is especially important for:
- Weekly mowing sessions longer than 30 minutes
- Riding mowers and commercial equipment
- Using a string trimmer or leaf blower alongside mowing (which can add 5–10 dBA)
- Children and teenagers, whose hearing is more susceptible to damage
For electric and robotic mowers: generally not necessary. Most electric mowers operate at 70–80 dBA, which is comparable to a dishwasher or shower — annoying, perhaps, but not dangerous even over extended periods.
Any NRR 25+ foam earplug from a hardware store costs under $1 and solves the problem. There's no reason not to use them.
What About Your Neighbors?
If you're wondering about the noise impact on people nearby — a gas mower at 50 feet drops to roughly 70–75 dBA, which is comparable to a dishwasher. Annoying through an open window, but well below hearing damage thresholds and within most municipal noise ordinance limits for daytime hours. At 100 feet, expect 60–65 dBA — about the level of normal conversation.
How Does a Lawn Mower Compare?
To put it in perspective: a gas mower at 90 dBA carries about 1,000 times more sound energy than a normal conversation at 60 dBA. That's the logarithmic scale at work — every 10 dB increase represents a 10x increase in energy. For a full comparison with 40+ common sounds, see our decibel chart.
Want to measure your own mower? Use your iPhone with a decibel meter app to check the actual noise level at your position while mowing. Hold the phone at arm's length, microphone facing the mower, and take a 30-second average reading in dBA mode.