How loud is a lawn mower? Lawn mower decibels explained
A petrol lawn mower typically measures 85 to 95 decibels at the operator's ear. Electric and battery mowers usually sit 10 to 15 dB lower. At 90 dB the safe daily exposure is under three hours, so ear defenders are sensible for a long mow.
Written by Nayeem, Software Developer of SoundLevelTest.com
Last updated: (originally published )
Researched and compiled from published guidance by NIOSH, OSHA, CDC, and the WHO.
Typical sound level
| Sound | Typical level | Measured at |
|---|---|---|
| Petrol walk-behind mower, operator position | 85–95 dB | At the handle, operator's ear height |
How it compares to other sounds
| Level | Typical sound | Safe daily exposure |
|---|---|---|
| 70 dB | Vacuum cleaner, busy office, shower | No exposure limit |
| 85 dB | Heavy traffic, noisy restaurant, gas lawn mower | 8 hours |
| 90 dB | Hair dryer at close range, blender | 3 hours |
| 95 dB | Motorcycle, subway train | 48 minutes |
Rows are taken from the full decibel chart. Safe exposure follows the NIOSH recommended exposure limit of 85 dBA for eight hours with a 3 dB exchange rate.
Can this level affect your hearing?
Yes, with sustained use. Mowing is one of the most common ways people exceed the 85 dBA eight-hour limit at home. A single 30-minute cut at 90 dB uses a large share of the day's safe dose, and adding a strimmer or leaf blower afterwards easily pushes past it.
Lawn mower decibel levels by mower type
Mower noise depends far more on the power source than on the brand. The ranges below are general comparison values for the operator position, not measurements of a specific model.
| Mower type | Typical range |
|---|---|
| Manual reel (push) mower | 55–65 dB |
| Battery or corded electric lawn mowers | 70–80 dB |
| Petrol walk-behind push mowers | 85–95 dB |
| Riding mowers and ride-on tractors | 90–100 dB |
The gap between electric lawn mowers and petrol models matters more than it looks. Because the decibel scale is logarithmic, a 10 dB drop roughly halves perceived loudness, and a drop from 90 dB to 80 dB multiplies the safe exposure time several times over. Ambient noise in the garden — traffic, neighbours, other machines — adds on top of the mower, so a busy street can push the level at your ear higher than the mower alone.
How does lawn mower noise affect your hearing?
Noise-induced hearing loss builds from the total dose across a day, not from one loud moment. At 85 dB the recommended limit is eight hours; at 90 dB it falls to roughly two and a half hours, and at 95 dB to about 45 minutes. A typical petrol mow of 30 to 60 minutes therefore uses a serious share of a day's safe dose before any strimmer, blower or power tool is switched on.
- Wear muffs or plugs for any petrol mow longer than about 20 minutes.
- Service the mower — worn blades, loose guards and poor exhaust seals all raise the level.
- Switch to an electric mower for small lawns if noise is the main concern.
- Keep children and bystanders well back; increasing distance lowers the level quickly.
You can check your own mower with the free online sound level test held at operator-ear height, then compare the reading against the 90 dB benchmark on the decibel chart.
Sources
Blomberg and Sawchuck, Lawn Mower Noise (Noise-Con 2017): measured operator-ear averages for electric, gas and ride-on mowers in Figure 3.
NIOSH, Criteria for a Recommended Standard: Occupational Noise Exposure: 85 dBA / 8 hours limit.
OSHA, Occupational Noise Exposure: US workplace limits and hearing protection.
The range above is a general comparison value, not a model-specific measurement. Actual levels vary by mower, condition and operator position.