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Pneumatic Cylinder Air Consumption Calculator

Estimate free air per full double-acting cycle and per minute, including the rod area.

Pneumatic Cylinder Air Consumption Calculator

FREE ONLINE TOOL
Cylinder cross-section
D = 50 mmd = 20 mmPistonRod

Schematic only, not to scale. Move the piston to explore the two chambers. Calculations use full stroke.

Swept volume per cycle

1.8064 L/cycle

Free air per cycle

12.6449 L/cycle

Free-air consumption

126.4491 L/min

Formula and assumptions

Vcycle = (A + Ar) × stroke; Vfree = Vcycle × (pg + p0)/p0; Qfree = Vfree × cycles/min

Double-acting cylinder; one cycle means one extension plus one retraction. Equal air temperatures, both chambers filled at supply pressure; excludes hoses, dead volume, cushioning and leaks. Free-air volume is referenced to entered ambient pressure.

Technical reference: Festo — Cylinder air consumption

STEP BY STEP

How to use pneumatic cylinder air consumption calculator

  1. Check the input units and assumptions.
  2. Review the result and example.

IN PRACTICE

Example

50/20 mm, 500 mm, 6 bar(g), 1 bar(a): ≈ 12.645 L/cycle; 10 cycles/min ≈ 126.45 L/min.

GOOD TO KNOW

Which model does this calculator use?

Double-acting cylinder; one cycle means one extension plus one retraction. Equal air temperatures, both chambers filled at supply pressure; excludes hoses, dead volume, cushioning and leaks. Free-air volume is referenced to entered ambient pressure.

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