Plant optimization calculator · Updated 17 September 2026
Condenser Vacuum Calculator — Absolute Pressure, Vacuum & Vacuum Percent
Convert barometric and condenser absolute pressure into vacuum pressure, vacuum percentage and equivalent kPa/bar values for steam-plant diagnostics.
Inputs
Live results
- Vacuum 91.325 kPa
- Vacuum 0.91325 bar
- Vacuum percentage 90.130767%
- Absolute pressure ratio 0.098692327
Formula
Vacuum=Pbarometric−Pabsolute; vacuum%=Vacuum/Pbarometric×100.
Worked example
101.325 kPa barometric and 10 kPa absolute gives 91.3 kPa vacuum.
Assumptions and limits
- Both pressures must be absolute and use the same units.
- Local barometric pressure changes with weather and elevation.
FAQs
What does this Condenser Vacuum Calculator calculate?
Convert barometric and condenser absolute pressure into vacuum pressure, vacuum percentage and equivalent kPa/bar values for steam-plant diagnostics.
Can I use this for a final design?
Use it for screening, diagnostics and opportunity sizing. Validate final design against measured plant data, OEM limits and applicable standards.
Why does the calculator show intermediate results?
Intermediate engineering quantities make bad inputs and unrealistic assumptions easier to spot before a decision is made.