Pressure Converter
Convert pascals, kilopascals, bar, atmospheres, PSI, mmHg and more. Type in any unit; all others update instantly.
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About This Converter
This pressure converter supports 10 units spanning scientific, engineering, meteorological, and everyday systems. Every calculation passes through a Pascal base, so results are precise whether you are reading tire pressure in PSI, checking blood-pressure readings in mmHg, monitoring weather in millibars, or working with industrial specs in bar or atmospheres. It is a handy tool for physics, engineering, weather, medical, and automotive applications.
FAQ
What's the difference between bar and atm?
1 bar = 100,000 Pa, while 1 atm (standard atmosphere) = 101,325 Pa. They are very close — 1 atm is about 1.01325 bar — but they are not identical. Bar is widely used in industry and meteorology; atm is the traditional reference for standard conditions in chemistry and physics.
Why do weather reports use mbar or hPa?
1 millibar (mbar) is exactly equal to 1 hectopascal (hPa). Weather services adopted this scale because sea-level pressure (~1013 mbar) falls in a convenient numeric range. The unit also ties neatly to the SI system through the pascal.
What tire pressure in PSI vs bar?
A typical passenger-car tire is inflated to about 32–35 PSI, which is roughly 2.2–2.4 bar. To convert: divide PSI by ~14.504 to get bar, or multiply bar by ~14.504 to get PSI.
What is mmHg used for (blood pressure)?
mmHg (millimeters of mercury) is the traditional unit for blood-pressure readings. A normal reading is about 120/80 mmHg. The unit originates from mercury manometers historically used in medical practice. 1 mmHg equals approximately 133.322 Pa.