What is pressure converter?
A pressure converter changes force per area between units such as PSI, bar and pascal. It is useful for tires, weather, diving, plumbing and engineering.
One standard atmosphere is 101,325 pascals, 1.01325 bar or 14.696 PSI.
How to use the pressure converter
- Enter the value.
- Choose the unit you have and the unit you want.
- Read the result and the table of all units.
How the pressure converter works
Each value is converted to pascals using exact factors, such as 6,894.757 pascals per PSI and 100,000 pascals per bar. The result is divided by the factor of the target unit.
Worked example
Common uses of the pressure converter
- Setting tire pressure.
- Reading weather reports.
- Diving and scuba planning.
- Plumbing and boiler checks.
- Physics homework.
Tips and common mistakes
Tire gauges in the United States use PSI, while most other countries use bar or kilopascal.
Use the table to compare many units at once.
Background: what to know before you rely on it
Pressure is force spread over an area, and the SI unit is the pascal, which is one newton per square meter. Because a pascal is tiny, everyday use relies on kilopascals, bars and PSI. Atmospheric pressure at sea level averages 101.3 kilopascals and falls with altitude. Blood pressure is still given in millimeters of mercury because early instruments used a column of mercury.
Private, free and fast
This tool runs entirely in your browser. What you type or choose is not uploaded to a server and is not saved after you close the page, which keeps it fast and private. It is free to use as often as you like. See more in all converters, or browse the full list of tools.
Frequently asked questions
How many PSI are in a bar?
About 14.5038.
What is one atmosphere in PSI?
14.696.
Is mmHg the same as torr?
Almost. A torr is 1/760 of an atmosphere and mmHg is very close to it.
What unit is used for tires?
PSI, bar or kPa, depending on the country.
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Results are for information and education. For legal, financial, medical or security decisions, check with a qualified professional. Check critical conversions with an official source.