How CFM sizing works
Duty factors, nameplate CFM, and when to stop at NO_MATCH.
Portable compressor sizing
Shop air compressor CFM calculator
Enter tool SCFM @ 90 PSI and duty. Get required delivery and a 2.2 / 3.35 / 5.3 CFM portable class — or NO_MATCH.
Portable compressor sizing
Result
Required = tool SCFM × duty (1.0 intermittent / 1.25 frequent / 1.5 continuous). Classes: 2.2 · 3.35 · 5.3 CFM @ 90 PSI. Compare nameplate delivery, not peak HP.
From measurement to decision
Open the full calculator
Same tool with room for examples.
2.2 vs 3.35 vs 5.3 CFM
When each portable class fits — and when none do.
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