Pressure Converter
Convert between pascals, bar, PSI, atmospheres, torr, and other pressure units.
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How to use this calculator
- 1
Enter your pressure value in the "From" field.
- 2
Select the unit you are converting from (e.g. PSI).
- 3
Select the target unit (e.g. bar).
- 4
The result appears instantly.
Frequently asked questions
How do I convert PSI to bar?
Multiply PSI by 0.0689476 to get bar. For example, 30 PSI = 30 × 0.0689476 = 2.068 bar. Or divide PSI by 14.5038.
What is standard atmospheric pressure?
Standard atmospheric pressure (1 atm) = 101,325 Pa = 1.01325 bar = 14.696 PSI = 760 mmHg (Torr).
What is the difference between bar and PSI?
1 bar ≈ 14.5038 PSI. Bar is used in most metric countries for tyre pressure and industrial applications. PSI (pounds per square inch) is used in the US and UK.
What pressure should my car tyres be?
Typical car tyre pressure is 30–35 PSI (2.07–2.41 bar). Always check your vehicle's handbook or the sticker inside the driver's door for the manufacturer's specification.
What is a pascal in everyday terms?
One pascal is a very small pressure — approximately the pressure exerted by a dollar bill lying flat on a table. Atmospheric pressure is about 101,325 Pa, so kilopascals (kPa) are more commonly used.
Pressure unit conversion guide
The SI unit of pressure: Pascal
The Pascal (Pa) is the SI base unit of pressure, equal to one newton per square metre. It is named after Blaise Pascal. Because atmospheric pressure is ~101,325 Pa, kilopascals (kPa) and megapascals (MPa) are commonly used in engineering. Bar (100,000 Pa) is widely used in Europe.
Common pressure unit applications
PSI is used for tyre pressure and hydraulics in the US. Bar is used for tyre pressure in Europe. kPa is used in weather forecasts and medicine. mmHg (Torr) is used for blood pressure and vacuum measurements. Atmospheres (atm) are used in chemistry and diving.
Key pressure conversion factors
1 atm = 101,325 Pa = 1.01325 bar = 14.696 PSI = 760 Torr | 1 bar = 100,000 Pa = 14.504 PSI | 1 PSI = 6,894.76 Pa = 0.06895 bar | 1 MPa = 145.038 PSI.
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