Compressed-air calculator

Sizing an air compressor

A compressor does not draw the same air everywhere: the site’s altitude, temperature and humidity reduce the air mass actually available at the intake.

This calculator translates your need into the ACFM capacity required at actual site conditions — the step that keeps a purchase from being undersized.

Compressor sizing

Required ACFM capacity for site altitude, temperature and humidity.

Scenario 1

US SI

Altitude (ft) Temp. min (°F) Temp. max (°F) RH min (%) RH max (%)

Required capacity

ACFM (min conditions): —ACFM
ACFM (max conditions): —ACFM

Scenario 2

US SI

Altitude (ft) Temp. min (°F) Temp. max (°F) RH min (%) RH max (%)

Required capacity

ACFM (min conditions): —ACFM
ACFM (max conditions): —ACFM

CAGI / ISO 1217 correction (Annex C). Recommended = worst case (max conditions).

Indicative estimates — validate all results before any technical decision.