Pressure Converter
Enter a pressure in any unit to see it in every other unit at once.
How to use it
- Enter an amount Type the pressure to convert.
- Choose the starting unit Select it in the "From" menu.
- Read the conversions All other units update instantly.
Examples
| 1 atmosphere | 101,325 Pa |
|---|---|
| 1 bar | 14.5 psi |
About this tool
Pressure is measured in many different units across science, weather, engineering and tyres. This converter links the common ones — pascals and bar (metric), pounds per square inch (US), atmospheres, and the millimetres or inches of mercury used in weather and medicine.
The factors are exact or standard definitions, so conversions are precise. Everything runs in your browser.
Frequently asked questions
How many psi are in a bar?
One bar is about 14.5 psi. One standard atmosphere is 14.696 psi.
What is standard atmospheric pressure?
One atmosphere equals 101,325 pascals, 1,013.25 millibar or 760 mmHg.
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Updated June 12, 2026