MihsabaHow to use
Convert one pressure reading across common metric, engineering and atmospheric units using the pascal as the common base. Supported units include Pa, kPa, MPa, hPa, bar, mbar, psi, standard atmosphere, Torr, mmHg and inHg.
- Enter the pressure reading and select its current unit.
- Choose the target pressure unit.
- See the target value plus quick equivalents in pascals, bar, psi and standard atmospheres.
How it is calculated
Example
Example: 1 bar = 100,000 Pa ≈ 14.503773773 psi ≈ 0.986923267 atm. One standard atmosphere is exactly 101,325 Pa by definition.
Important notes
This tool converts units only; it does not know whether a reading is absolute pressure or gauge pressure relative to ambient air. A negative gauge reading can therefore be converted mathematically but should not be treated as a negative absolute pressure. Torr and mmHg are very close but are kept as distinct definitions here.
Frequently asked questions
How many psi are in 1 bar?
About 14.503773773 psi.
Is 1 atm the same as 1 bar?
No. 1 atm is 101,325 Pa, while 1 bar is 100,000 Pa.
Are Torr and mmHg identical?
They are extremely close in ordinary use, but this converter keeps separate factors for the two definitions.
Is this calculator free?
Yes. It is free to use and requires no account.