Air Consumption Calculator (SCFM)
This calculator determines the compressed air consumption of single-acting pneumatic cylinders. For double-acting cylinders, the actual consumption is approximately double (extend...
Formula
Source: Engineering Toolbox, Parker Hannifin Pneumatics | Last reviewed: June 8, 2026
Examples
0 SCFM
= 0.44 SCFM
- bore = 4
- stroke = 6
- cycles_per_min = 10
- cylinders = 1
Single 4in bore × 6in stroke cylinder at 10 CPM = 0.44 SCFM
0 SCFM
= 11.78 SCFM
- bore = 6
- stroke = 12
- cycles_per_min = 30
- cylinders = 2
Two 6in bore cylinders at high cycle rate
0 SCFM
= 0.44 SCFM
- bore = 2
- stroke = 4
- cycles_per_min = 60
- cylinders = 1
Small 2in cylinder at 60 CPM
Where is this used?
Specifying compressed air dryers and filters based on total system consumption.
Energy cost estimation for pneumatic automation systems.
Frequently Asked Questions
What about the retract stroke?
This calculation covers one stroke direction. For double-acting cylinders (air used in both directions), multiply the result by 2. The retract side has slightly less volume (rod reduces area), so multiply by ~1.9 for rodded cylinders.
How does operating pressure affect consumption?
This calculates the swept volume at atmospheric pressure. To convert to compressed air consumption at line pressure, divide by the compression ratio: SCFM_at_pressure = SCFM × (14.7 / (P_line + 14.7)). Higher pressure means more air mass consumed.
Should I include a duty cycle factor?
Yes, for intermittent operation. If cylinders operate 30% of the time, multiply the result by 0.3 for average consumption. This calculator gives 100% duty cycle consumption.
Reviewed for accuracy
· Last reviewed: June 8, 2026
All calculations are for reference only. Always verify with manufacturer data and a qualified engineer for critical applications. Learn about our editorial process.