How loud is an air compressor?
Decibels in plain English
Decibels are logarithmic. Every 10 dB increase is ten times the sound energy and sounds roughly twice as loud. So a 60 dB compressor sounds about half as loud as a 70 dB one and about a quarter as loud as an 80 dB pancake. For reference:
- Whisper: about 30 dB
- Quiet office: about 50 dB
- Conversation: about 60 dB
- Vacuum cleaner: about 75 dB
- Lawn mower: about 90 dB
Why compressor dB ratings aren't always comparable
A noise rating depends on how it was measured. Distance matters most: sound drops about 6 dB each time you double the distance in open space, so a figure taken at 20 feet looks much better than one taken at 3 feet. Some brands follow a standard such as ISO 3744 and say so; many quote a number with no method at all. Ratings are usually A-weighted (dBA), which matches how human ears hear.
That's why every product on this site shows the source of its noise figure, and why we treat differences of 1–2 dB as a tie. We don't present manufacturer numbers as our own measurements.
Ratings for the compressors we cover
| Compressor | Rated noise | Source |
|---|---|---|
| California Air Tools CAT-1P1060S | 56 dB | Manufacturer rating, measuring distance not stated |
| Metabo HPT EC28M | 59 dB | Manufacturer rating, measuring distance not stated |
| California Air Tools 8010A | 60 dB | Manufacturer rating, measuring distance not stated |
| Makita MAC320Q Quiet Series | 60 dB | Manufacturer rating, measuring distance not stated |
| California Air Tools 2010A | 60 dB | Manufacturer rating, measuring distance not stated |
| Makita MAC210Q Quiet Series | 60 dB | Manufacturer rating, measuring distance not stated |
| Rolair JC10 Plus | 60 dB | Manufacturer rating (dBA), measuring distance not stated |
| Milwaukee M18 FUEL 2 Gallon Compact Quiet Compressor | 68 dB | Manufacturer rating (dBA), measuring distance not stated |
| California Air Tools 10020C | 70 dB | Manufacturer rating, measuring distance not stated |
| California Air Tools 4620AC | 70 dB | Manufacturer rating, measuring distance not stated |
| California Air Tools 20020 | 70 dB | Manufacturer rating, measuring distance not stated |
| DEWALT DWFP55130 Quiet Trim Compressor | 71.5 dB | Manufacturer rating (dBA, ISO 3744) |
| California Air Tools CAT-60040CAD | 75 dB | Manufacturer rating (dBA), measuring distance not stated |
| DEWALT 20V MAX Inflator DCC020IB | 77 dB | Retailer spec (dBA), measuring distance not stated |
| VEVOR 10 Gallon 2HP Oil-Free | 78 dB | Seller listing, measuring distance not stated |
| DEWALT DXCM271 27 Gallon Vertical | 78 dB | Manufacturer rating (dBA), measuring distance not stated |
| BOSTITCH BTFP02012 6 Gallon Pancake | 78.5 dB | Manufacturer rating (dBA), measuring distance not stated |
| Metabo HPT EC914S 'The Tank' | 79 dB | Distributor spec sheet (ISO 3744); Amazon lists 73 dB |
| VIAIR 88P Portable 12V | 81 dB | Manufacturer rating at 0 PSI |
| PORTER-CABLE C2002 6 Gallon Pancake | 82 dB | Amazon listing spec, measuring distance not stated |
| CRAFTSMAN 6 Gallon 150 PSI Pancake | 82 dB | Manufacturer manual, measuring distance not stated |
| Ingersoll Rand 2340L5-V Two-Stage | 85 dB | Retailer spec, measuring distance not stated |
| VEVOR 80 Gallon 6.5HP Oil-Free | 86 dB | Seller listing, measuring distance not stated |
| Ingersoll Rand SS3J5.5GH-WB Gas Wheelbarrow | 89.7 dB | Retailer spec, measuring distance not stated |
What makes a compressor loud?
- Motor speed: cheap direct-drive pumps spin around 3,400 RPM; quiet designs turn about half that.
- Pump type: single small pistons working hard are louder than twin pistons working gently.
- Intake and exhaust: an open intake and the pressure-switch "pssst" add sharp noise.
- Vibration: a compressor on a hard floor or a hollow bench turns the surface into a speaker.
- Engines: gas compressors add engine noise, so they are the loudest of all.
How to quiet an air compressor
- Move it away. Put the compressor in another room, a closet or outside, and run a longer hose or hard line to where you work. Doubling distance cuts about 6 dB.
- Isolate vibration. Stand it on rubber anti-vibration pads or a thick rubber mat, away from walls.
- Fit an intake silencer. A housing-style intake filter muffles intake noise and keeps the pump clean. See air compressor filters.
- Build a ventilated enclosure. Sound-absorbing panels around the compressor help, but compressors make heat. Give any enclosure generous ventilation (ideally a fan) and never trap the motor in a sealed box.
- Maintain it. Loose shrouds, worn bearings and dry pumps get louder. Tighten, clean and service it.
- Replace it. If you work near it every day, a 60–70 dB quiet compressor is the biggest single improvement. See the quiet ranking.
Protect your hearing. Long exposure to noise around 85 dBA and above can damage hearing; the US workplace safety agencies (OSHA, NIOSH) use 85 dBA averaged over a workday as an action or recommended limit. Wear hearing protection around loud compressors, impact wrenches and gas units.
Frequently asked questions
How loud is a typical air compressor?
Typical pancake and contractor compressors are rated around 78–85 dB, shop compressors around 80–90 dB, and gas compressors around 85–95 dB. Quiet models are 60–70 dB.
Is 70 dB loud for an air compressor?
No. 70 dB is quiet for a compressor, about the level of a busy office or a dishwasher, and roughly half as loud as an 80 dB pancake compressor.
How do you make an air compressor silent?
You can't make one truly silent, but you can make it much quieter: move it away and use a longer hose, isolate it on rubber pads, fit an intake silencer and build a ventilated sound enclosure. Together these can make a loud compressor sound far quieter at your work position. For near-silent operation, buy a compressor rated 60 dB or less.
Can I build my own silent air compressor, for example from a refrigerator compressor?
Some hobbyists build quiet compressors from refrigerator compressors and a spare tank, and they can be very quiet. But they make very little air (suited to airbrushes, not tools), need oil management, and a homemade build must use a pressure-rated tank, a pressure switch and a correctly rated safety relief valve. An unrated tank can rupture. For most people, a purpose-built quiet compressor is safer and costs less in the end.
Can I build a box to silence my compressor?
Yes, with care. Lined enclosures reduce noise, but compressors produce a lot of heat. Include large vents or a fan, keep the intake supplied with cool air, and leave access to the drain and relief valve.