How do I know what air compressor to buy
John Thompson
Updated on March 23, 2026
Determine which one requires the highest CFM at the highest PSI. Add 50% to the required CFM for a margin of safety, and look for a compressor that meets the requirement. For example, if a tool requires 3 CFM at 90 PSI, select a compressor that delivers at least 4.5 CFM at 90 PSI.
What size air compressor do I need for my house?
American manufacturers measure air compressor tank sizes in U.S. gallons. There is a wide range of reservoir capacities on the market ranging from small but efficient 1-gallon models up to large commercial 80-gallon products. For your home garage, a compressor size in the 2.6-gallon to 20-gallon range should do nicely.
How big of an air compressor do I need to air up tires?
For filling car tires, you will only need to run them up to the 32 PSI for most passenger cars, or maybe 35 PSI on a cold day. A portable 1 or 2 CFM compressor, at 90 PSI, should serve you well for filling car tires. If you need to run a tire changing machine, though, then you will need 4 CFM or so.
How many CFM do I need air compressor?
Air tools made for general use with portable air compressors typically require 0 to 5 cubic feet per minute (cfm) at 70 to 90 pounds per square inch (psi), whereas with larger tools connected to stationary systems, the requirements usually exceed 10 cfm at 100 to 120 psi.Is a 6 gallon air compressor enough?
Air Compressor Tank Size If you only intend to use the tool intermittently, your compressor can have a smaller tank size. … Tools that require only quick bursts of air, like pneumatic brad nail guns and finish nail guns, drain the air tank much more slowly. For these tasks, 2- to 6-gallon tanks are sufficient.
How many gallon air compressor Do I need to fill car tires?
What Size Do You Need for Tires? For home use, a simple 3- to 6-gallon tank is fine, and a CFM of 2-3 is perfect for the continuous air dispersal needed to fill a tire. The small tank size is also ideal for portability. An air compressor of this size is great for general home use and smaller-sized air tools.
What size compressor is needed for spray painting?
Paint sprayers require a compressor with a large tank, preferably from 50 gallons and above, in order to be able to keep up with the spray gun. When these three factors are considered when buying an air compressor for your paint sprayer, you’ll definitely make the right choice.
Can a small air compressor run an impact wrench?
The size of the air compressor you need for an impact wrench typically depends on the size of the impact wrench. The average size air compressor you need is a 4-5 CFM @90 PSI for a ½” impact wrench. … Most impact wrenches have the ½” drive that you will most likely be looking at about 4 to 5 CFM @90 PSI.What is a 6 gallon compressor good for?
This portable oilless air compressor is great for powering nailers, general shop clean-up, airing tires and inflating sports equipment. This 6 gallon compressor has a pancake style tank for maximum stability and a full-coverage shroud to protect gauges and cooling fins. Designed to start easily even in cold weather.
What can I use a 6 gallon air compressor for?With a refill rate of 2.6 CFM, this little electric air compressor quickly refills the 6-gallon tank to provide enough force for all but the most demanding pneumatic tools. The oil-free unit can be used for automotive repairs, fastening, inflating, cutting, drilling, and even for small spray painting jobs.
Article first time published onWhat kind of air compressor do I need for a paint gun?
For small projects or single panels, your Air Compressor should be rated at 100% of the CFM required by your paint gun. If you’re spraying a whole car, you’ll want 150-200%. For example: A 15-20 CFM air compressor is a good match for a 10 CFM paint gun.
How many PSI does it take to paint a car?
Look for a minimum of 15 psi, with some applications, such as clear coat, better-suited to 20 or 25 psi. Horsepower: For auto painting, a 10hp compressor will typically suffice. However, higher horsepower compressors may operate more efficiently, and can be used for other tasks.
Can you paint a car with a 6 gallon air compressor?
It’s recommended to pick yourself up a 60 Gal tank with a 5-6 HP compressor that put’s out enough CFM that will supply your spray gun. … YES, you can paint the car in steps (same day) with a smaller air compressor but you may run into problems with overspray on the clear coat stage.
How much psi do you need for air tools?
Most air tools require between 70 and 90 PSI. Any light-to-medium-duty air compressor can easily handle 90 PSI, but you always want the compressor to supply more flow than needed. Pro Tip: Always respect a PSI rating.
How do you break in a Ridgid air compressor?
Turn the compressor ON by moving the switch to the AUTO/ON position and run the air compressor for a period of 20 minutes to break-in the air pump. 9. With the compressor still running, at the end of the 20-minute break-in period, close (turn counterclockwise) the tank drain valve.
How long does it take to fill a 6 gallon air compressor?
Q: How much time does it take to fill up? It depends on what the pressure is set on your compressor. Usually, it takes about 3 minutes to 5 minutes.
Does tank size matter air compressor?
Tank size matters—sometimes The compressors we chose have tanks ranging from 1 to 6 gallons. A larger tank holds more air and will allow you to use more air before the pressure drops and the motor kicks on to refill the tank. That might let you avoid stopping work while the compressor refills the tank.
What is the difference between SCFM and CFM?
SCFM and CFM are both essential values that indicate the airflow rate in a compressor. SCFM measures this value based on ‘ideal’ temperature and pressure conditions, while CFM measures the ‘actual’ air flow rate. CFM is the recognized value for measuring the airflow rate in the United States.
Which brand of air compressor is best?
MakeTank sizeBest air compressor overallIndustrial Air20 gallonBest stationary air compressor/Best premium air compressorQuincy60 gallonBest portable air compressorBriggs & Stratton10 gallonQuietest air compressorCalifornia Air Tools20 gallon
What is a pancake air compressor used for?
A pancake compressor is a small, portable air compressor used for home and commercial jobs where a smaller volume of air is needed. The term “pancake” refers to the flat, oval-shaped tank used to store the compressed air, resembling a pancake served for breakfast.
What PSI is needed for spray painting?
When spraying base coat you want to spray at about 26-29 PSI. They way you read this is at your gun, trigger pulled air flowing through and your dial reading 26 psi. When spraying clear coat I like to up the pressure 2-3 psi for a little more atomization and better flow out.
How many CFM do I need for a paint gun?
For a quality HVLP Spray Gun you can often need up to 20 CFM of air. If you are using a Conventional Spray Gun you may not need as much air as HVLP requires a High Volume of air (HV) especially compared to conventional spray guns, but a conventional spray gun can still use 10 – 15 CFM.
How big of an air compressor do I need for a LVLP spray gun?
SprayerCFMsDeVilbiss12-13Iwata LVLP16TCP Global Kit3.5-7.1
Can I paint a car with a 20 gallon air compressor?
The gallons of the compressor isn’t usually an issue, but the compressor itself and the CFM it puts out is. … These have a built in air-compressor that are a very high CFM but have almost no air reserve. Most can be stored under a workbench and can paint an entire car no problem.
What type of compressor is best for auto body work?
Vehicle service, repair and auto body shops typically rely on 5 to 30 HP air compressors with 80 to 240 gallon air receivers that power an automotive shop’s pneumatic tools and equipment.
How big of an air compressor do I need for a HVLP spray gun?
HVLP guns require plenty of air, so you need to have a larger capacity compressor higher than those used for diy home works. In order to spray the full range of finishing products, however, you need at least a 21⁄2 to 3 HP compressor with a 75 liters (20 gallons) tank.
What size air compressor do I need to run a DA sander?
Most sanders use a lot of air. These Dynabrade sanders are listed as requiring 14 to 16 SCFM depending on the model. Takes a pretty good compressor. That is about the output one would expect from a 4-5 HP air compressor.