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Leak rate

Pressure Decay Leak Rate Calculator

Estimate leak rate from system volume, pressure drop, and elapsed time when production demand is isolated.

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Leak rate

Run the calculation

Estimate leak rate from system volume, pressure drop, and elapsed time when production demand is isolated.

Engineering inputsPressure Decay Leak Rate Calculator

Enter the known application values. Outputs update instantly as units or assumptions change.

Pressure unit
Use these values for preliminary sizing before final datasheet review.

Engineering visual

Pressure Decay Leak Rate Calculator calculation map

The receiver stores compressed air between high and low pressure limits while supply and demand flows enter and leave the vessel.

Pressure Decay Leak Rate Calculator calculation mapThe receiver stores compressed air between high and low pressure limits while supply and demand flows enter and leave the vessel.SUPPLY QsDEMAND QdHIGH pHLOW pLVOLUME V
  1. 01System volume
  2. 02Calculate and compare
  3. 03Leak flow
Estimated leak rate
Estimated SCFM
Pressure drop
Leak vs entered demand

Calculation reference

What this tool checks.

The calculation uses the pressure drop in a known receiver and piping volume to estimate free-air leakage.

Inputs

  • System volume
  • Start pressure
  • End pressure
  • Decay time
  • Optional average demand

Outputs

  • Leak flow
  • Leak as percent of demand
  • Pressure drop
  • SCFM

Engineering guide

Use the result with the right context.

Calculate pressure decay leak rate calculator from application data and interpret the result for preliminary pneumatic engineering review.

Calculation workflow

  1. Enter the known application values, including System volume, Start pressure, End pressure.

  2. Run the calculation using one consistent set of units and reference conditions.

  3. Review Leak flow, Leak as percent of demand, Pressure drop, then compare the result with the component datasheet and application margin.

Assumptions and limits

  • Keep standard, free-air, and actual compressed-volume reference states consistent throughout the calculation.

  • Confirm compressor, dryer, filter, receiver, pipework, ambient, and operating schedules with measured plant data.

FAQ

Common review questions.

01Tool noteWhen is pressure-decay testing useful?

It is useful when production can be isolated and the system volume is known, especially before a detailed leak survey.

02Tool noteWhy should the pressure drop be small?

Leak rate changes with pressure. A limited pressure drop gives a more representative estimate around the normal operating pressure.

03Tool noteWhat should I verify after using the Pressure Decay Leak Rate Calculator?

Check the entered units and reference conditions, then compare the calculated outputs with manufacturer ratings, application safety margins, transient loads, installation losses, and measured machine performance.