Air Compressor Size Calculator: What CFM Do You Need?
Free calculator: pick the air tools you'll run and get the minimum CFM and tank size your air compressor needs, with headroom built in.
Pick the tools you plan to run and we'll work out the minimum airflow (CFM at 90 PSI) and a sensible tank size. The single most common mistake is buying on tank size or horsepower; CFM is what decides whether a tool works.
Which tools will you run?
Usage:
Tools draw air in short bursts, so we add 50% headroom to the figure above to cover duty cycle and pressure drop. If you expect to run a tool continuously (sanding, sandblasting, spraying), size up further.