Hose, Tubing & Fluid Conveyance Products calculator

Pressure Decay Test Calculator

Set up the key parameters for a pressure decay leak test. Enter assembly working pressure, test pressure multiplier, and test hold time. The result gives the test pressure to apply and the hourly pressure equivalent.

What this calculator does

  • Estimate test hold pressure and hourly pressure equivalent for a hose or tubing assembly pressure decay leak test from working pressure, test multiplier, and hold time.
  • Use it when setting up a pressure decay leak test procedure for hose or tubing assemblies, or reviewing test parameters against the product working pressure.
  • Calculates the test pressure and time-based equivalent for a pressure decay test on hose or tubing assemblies.

Formula used

  • Pressure decay test pressure = working pressure x test pressure multiplier
  • Hourly test pressure equivalent = test pressure / test hold time

Inputs explained

  • Assembly working pressure: Maximum allowable working pressure of the hose or tubing assembly from the product specification.
  • Test pressure multiplier: Ratio of test pressure to working pressure. Proof test is typically 1.5; leak check is often 1.0.
  • Test hold time: Duration of the pressurized hold period from your test procedure, expressed in hours.

How to use the result

  • Use it when setting up a pressure decay test procedure or reviewing test parameters against working pressure requirements.
  • It calculates test pressure and time equivalent. It does not model gas compressibility, volume correction, temperature effects, or pass or fail criteria. Those require a validated test procedure.

Common questions

  • What is the Pressure Decay Test calculator for? It calculates the test hold pressure for a hose or tubing assembly pressure decay leak test from working pressure and a test multiplier.
  • What numbers do I need before using it? You need the assembly maximum working pressure, the test multiplier from your procedure or standard, and the test hold time.
  • How should I use the result? Use the test pressure to set your test equipment and confirm the applied pressure matches your procedure before testing assemblies.
  • When is the result only an estimate? It is an estimate for test setup purposes. It does not replace a validated test procedure or engineering-approved pass or fail criteria.

Last reviewed 2026-05-12.