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Leak Rate Calculator

Calculate Leakage Rate Parameters
Select Answer Mode
Pressure Loss (ΔP) [?]
Test Volume (V) [?]
Test Duration (t) [?]
Leak Rate (QL) [?]

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Change the answer mode for this tool by selecting pressure loss (ΔP), test volume (V), test duration (t) or leak rate (QL) as the parameter to calculate instead



Leak testing products
  • 500 psi absolute range HART enabled 4-20mA output diesel pressure sensor for pipeline leak testing use
  • 3000 psia high accuracy 0-10Vdc out pressure sensor for leak checking pressurized tanks
  • Vacuum range manometer for leak testing in hazardous areas
  • USB pressure sensors for detecting water leaks & restrictions

Request info on leak testing products for your application.

Contents

  • Related Tools
  • User Guide
    • Formulas
      • Symbols
    • Pressure Loss (ΔP)
    • Test Volume (V)
    • Test Duration Time (t)
    • Leak Rate (QL )

Related Tools

  • Leak rate units conversion
  • Pressure units conversion
  • Volume units conversion
  • Time units conversion

User Guide

This tool will calculate any parameter from the formula for leakage rate for a pressurised enclosed space, which includes  the difference in pressure from the start to the finish of leak test, the total volume of the space being tested, the elapsed time of the leak test, and the average leakage rate.

Formulas

The formulas used by this leakage rate calculator to determine each individual parameter are:

ΔP = QL · t / V

V = QL · t / ΔP

t = ΔP · V / QL

QL  = ΔP · V / t

Symbols

  • ΔP = Pressure loss
  • V = Test volume
  • t = Test duration time
  • QL = Leak rate

Pressure Loss (ΔP)

This is how much the pressure drops a leak test.

Test Volume (V)

This is the total internal volume of the vessel being tested.

Test Duration Time (t)

This is the time taken for the pressure to drop during a leak test.

Leak Rate (QL )

This is a measure of the rate of gas loss from a test volume over the duration of the leak test. It is intended to provide a measure of the proportion of the total gas that has escaped, so that the same pressure loss for a larger sized volume would result in a larger leak rate value.

Leak testing products
  • Pressure drop logging at 3 bar over a few seconds
  • 15 psig leak testing air pressure gauge with 1/4 NPT male fitting
  • 3000 psi leak test datalogging pressure sensor for certifying natural gas flow orifice fittings
  • 41X Low Range Digital Output Pressure Sensor

Request info on leak testing products for your application.

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Tool Feedback

Please provide feedback on using this Leak Rate Calculator.

Product Selection Guides

  • Differential Pressure Sensors
  • Digital Pressure Gauges
  • Digital Pressure Sensors
  • Digital Readouts
  • Hydrostatic Liquid Level Sensors
  • Millivolt Output Pressure Transducers
  • Pressure Transducers
  • Pressure Transmitters
  • Voltage Output Pressure Transducers

Application Selection Guides

  • Absolute Pressure
  • Dual Temperature and Pressure
  • Flush Diaphragm
  • High Frequency Response
  • Leak Testing
  • Low Pressure Range
  • Oxygen Service
  • Submersible
  • Vacuum

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