Best Air Compressor for Impact Wrench: 6 Picks Around 5 CFM at 90 PSI
Six 20 to 29 gallon air compressors that keep a 1/2 in impact wrench running, compared by CFM at 90 PSI, tank, max PSI, noise, amp draw and warranty.
On this page
Top picks at a glance
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- 1
Best OverallStealth SAQ-120189.6/10View on Amazon - 2
Most Air on 120VCalifornia Air Tools 200209.6/10View on Amazon - 3
Biggest TankKlutch 29 Gallon9.5/10View on Amazon - 4
Most Storage PressureDEWALT DXCM2719.5/10View on Amazon - 5
Metabo HPT Portable Pancake Air CompressorView on Amazon - 6
Makita MAC2400 2.5 HP* Big Bore™ Air CompressorView on Amazon - 7
DEWALT Air Compressor for TrimView on Amazon - 8
VEVOR 5HP Air Compressor Electric MotorView on Amazon
A 1/2 in impact wrench uses about 4 to 5 CFM of air at 90 PSI while it hammers, more than a pancake compressor can keep up with for long. This guide compares six 20 to 29 gallon compressors that can, by CFM at 90 PSI, tank size and pressure, stated noise, amp draw and warranty. All six plug into a household outlet.
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Quick picks
- Best Overall Stealth SAQ-12018: 5 CFM at 90 PSI from a 20 gallon tank at a stated 68 dB, with a limited lifetime warranty. Check price on Amazon
- Most Air on 120V California Air Tools 20020: 5.3 CFM at 90 PSI, the highest here, from a dual piston pump rated at 70 dB and 14 amps. Check price on Amazon
- Biggest Tank Klutch 29 Gallon: 29 gallons at 175 PSI and 5.1 CFM at 90 PSI for long impact and ratchet sessions. Check price on Amazon
- Most Storage Pressure DEWALT DXCM271: 200 PSI in a 27 gallon vertical tank with 5.1 SCFM at 90 PSI, for long bursts between cycles. Check price on Amazon
The picks
Stealth 20 Gallon Ultra Quiet Air Compressor,1.8
A 20 gallon, 120V oil-free compressor rated at 5 CFM at 90 PSI and a stated 68 dB, with a limited lifetime warranty.
Pros
- 5 CFM at 90 PSI covers a 1/2 in impact wrench
- Stated 68 dB, the quietest of the six
- Limited lifetime warranty stated
- Runs on 120V with two quick couplers and 8 in wheels
Cons
- 150 PSI maximum, lower than the 175 to 200 PSI units
- 121.4 lb to move around
- Oil-free pump, not built for all-day continuous use
- No electrical listing or ASME tank rating stated
California Air Tools 20020 2.0 HP Ultra Quiet
A 20 gallon, 2.0 HP oil-free compressor rated at 5.3 CFM at 90 PSI and a stated 70 dB, running at 1680 RPM.
Pros
- 5.3 CFM at 90 PSI, the most air here
- Stated 70 dB from a slow 1680 RPM motor
- Dual piston pump rated for a 3000 hour life cycle
- 1 year limited warranty stated
Cons
- 125 PSI maximum, the lowest tank pressure here
- Draws 14 amps, best on its own circuit
- Listing gives two weights, 114 and 134 lb
- No electrical listing or ASME tank rating stated
Craftsman Air Compressor
A 20 gallon, 175 PSI oil-free compressor rated at 4 SCFM at 90 PSI with two quick couplers.
Pros
- 175 PSI maximum stores plenty of reserve air
- 20 gallon tank with two quick couplers
- Oil-free pump, no oil changes
- 1 year limited warranty stated
Cons
- 4 SCFM at 90 PSI, below a 1/2 in impact wrench's top demand
- Stated 80 dB
- No weight or voltage stated
- No electrical listing or ASME tank rating stated
DEWALT 27-Gallon Vertical Portable Air Compressor
A 27 gallon vertical oil-free compressor rated at 5.1 SCFM at 90 PSI with a 200 PSI maximum and a low-voltage start motor.
Pros
- 5.1 SCFM at 90 PSI and 200 PSI maximum
- 27 gallon vertical tank saves floor space
- Low-voltage start motor for 110V circuits
- Stated 78 dBA
Cons
- No warranty term stated on the listing
- 136 lb, the heaviest here
- Draws 15 amps, needs its own circuit
- No electrical listing or ASME tank rating stated
Klutch 29-Gallon Air Compressor, 2.5 HP, 120V
A 29 gallon, 120V vertical oil-free compressor rated at 5.1 CFM at 90 PSI with a 175 PSI maximum.
Pros
- 29 gallons, the biggest tank here
- 5.1 CFM at 90 PSI on 120V
- 175 PSI maximum
- Vertical tank on large wheels
Cons
- No warranty term stated on the listing
- Stated 81 dB, the loudest of the six
- 127 lb
- No electrical listing or ASME tank rating stated
VEVOR 20-Gallon Air Compressor
A 20 gallon, 120V oil-free compressor rated at 4.5 SCFM at 90 PSI and 125 PSI maximum, weighing 90.8 lb.
Pros
- 4.5 SCFM at 90 PSI on 120V
- 90.8 lb, the lightest 20 gallon unit here
- Stated 70 dB
- 2.75 mm carbon steel tank stated
Cons
- No warranty term stated on the listing
- 125 PSI maximum
- New listing with little owner history
- No electrical listing or ASME tank rating stated
More options to compare
Metabo HPT Portable Pancake Air CompressorCheck price on Amazon
Makita MAC2400 2.5 HP* Big Bore™ Air CompressorCheck price on Amazon
DEWALT Air Compressor for TrimCheck price on Amazon
VEVOR 5HP Air Compressor Electric MotorCheck price on Amazon
Compare the picks
| Model | Shop Score | CFM @ 90 PSI | CFM @ 40 PSI | Tank | Max PSI | Noise (stated) | Power | Weight | Warranty |
|---|---|---|---|---|---|---|---|---|---|
| Stealth SAQ-12018 | 9.6/10 | 5.0 | 5.5 | 20 gal | 150 | 68 dB | 120V, 1.8 HP | 121.4 lb | Limited lifetime |
| California Air Tools 20020 | 9.6/10 | 5.3 | 6.4 | 20 gal | 125 | 70 dB | 110V, 14 A, 2.0 HP | 114 or 134 lb | 1 year limited |
| CRAFTSMAN 20 Gallon | 9.5/10 | 4.0 | Not stated | 20 gal | 175 | 80 dB | 1.8 HP | Not stated | 1 year limited |
| DEWALT DXCM271 | 9.5/10 | 5.1 | 6.8 | 27 gal | 200 | 78 dBA | 110V, 15 A, 1.7 HP | 136 lb | Not stated |
| Klutch 29 Gallon | 9.5/10 | 5.1 | Not stated | 29 gal | 175 | 81 dB | 120V, 2.5 HP | 127 lb | Not stated |
| VEVOR 20 Gallon | 9.5/10 | 4.5 | Not stated | 20 gal | 125 | 70 dB | 120V, 2 HP | 90.8 lb | Not stated |
Specifications are manufacturer rated, as published on each listing and collected 5 October 2026. “Not stated” means the listing does not give the figure.
How we scored them
Each compressor is scored out of 10 on performance, build, value, safety and warranty, with the weights published on our How We Pick page. None of the six states an electrical listing or an ASME-rated tank, so all score zero on safety. Three state no warranty term and score zero there too.
| Product | Shop Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| Stealth SAQ-12018 | 9.6 | 32 | 21 | 21 | 0 | 3 |
| California Air Tools 20020 | 9.6 | 33 | 22 | 20 | 0 | 2 |
| CRAFTSMAN 20 Gallon | 9.5 | 29 | 20 | 20 | 0 | 2 |
| DEWALT DXCM271 | 9.5 | 33 | 22 | 19 | 0 | 0 |
| Klutch 29 Gallon | 9.5 | 32 | 20 | 21 | 0 | 0 |
| VEVOR 20 Gallon | 9.5 | 29 | 20 | 22 | 0 | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.
What the listings tell you
We read 14 listings for 4.5 to 80 gallon compressors. Nine stated CFM at 90 PSI and six stated CFM at 40 PSI. Every one stated a noise figure, but only five stated the voltage and nine a warranty term. One, an 80 gallon 240V unit, stated an ASME-rated tank; none of the 120V units did.
Buying guide: sizing a compressor for an impact wrench
Match CFM at 90 PSI, then add margin
Check your wrench’s manual for its air use at 90 PSI. Most 1/2 in impacts sit around 4 to 5 CFM. With a 25 percent margin for hoses and couplers, that is about 6 CFM at 90 PSI. The units here deliver 4 to 5.3, so they keep up with tire work and short bursts and will cycle on long jobs. Use our CFM calculator to size for your exact tools.
Tank size and pressure
A bigger tank at higher pressure stores more air, so you run longer before the pump kicks in. A 29 gallon tank at 175 PSI holds far more usable air than a 20 gallon tank at 125 PSI. It does not raise the CFM.
120V and the circuit
These compressors draw up to 15 amps on 120V. Run them on a dedicated 20 A circuit if you can, and use a longer air hose instead of an extension cord. For 240V stationary units that feed sanders and spray guns, see the best air compressor for a home garage.
Hose and fittings
A 3/8 in hose and high-flow couplers lose less air than a 1/4 in hose with standard fittings, which matters when a compressor is near its limit.
Or go cordless
If tire changes are the only job, a cordless impact wrench skips the compressor entirely.
Pick the air tools you run and get the CFM at 90 PSI and tank size to shop for.
Wear eye protection with every air tool, use impact-rated sockets on impact wrenches, disconnect the air line before changing accessories, and finish lug nuts with a torque wrench to the vehicle's spec. See OSHA eye and face protection. Read our Safety Disclaimer.
Frequently Asked Questions
What size air compressor do I need for a 1/2 inch impact wrench?
Look for about 5 CFM at 90 PSI or more and a 20 gallon or larger tank. With a safety margin, 6 CFM at 90 PSI is ideal. Smaller compressors work for short bursts but cycle constantly.
Can a 20 gallon compressor run an impact wrench?
Yes, if it delivers around 4.5 to 5 CFM at 90 PSI. Tire rotations and lug nuts are short bursts, which a 20 gallon tank handles well.
Is CFM or tank size more important for an impact wrench?
CFM at 90 PSI. The pump sets how much air you get over time; the tank only stores a buffer. A big tank with a weak pump still runs dry on long jobs.
Do I need a 240V compressor for air tools?
Not for an impact wrench or ratchet. All six compressors here run on 120V. Continuous tools like DA sanders and spray guns are where 240V units earn their place.
Should I use a 3/8 or 1/4 inch air hose?
3/8 in for an impact wrench. It delivers more air to the tool, especially on runs over 25 feet.
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