Pressure converter
Convert tyre, weather, blood and industrial pressures between units.
1 Bar ≈ 14.50377377 Pounds per square inch (psi)
Exact factorRounded for display to about 10 significant digits.
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About these units
Pressure is force per unit area. The SI unit is the pascal, one newton per square metre; it is small, so kilopascals and megapascals are common. The bar (100 000 Pa) is used for tyres and diving in Europe, psi (pounds-force per square inch) in the United States.
Weather maps use hectopascals, numerically equal to millibars. Blood pressure is given in millimetres of mercury, and some gauges read in inches of mercury or inches of water. These manometric units assume a standard fluid density and standard gravity, so they are conventional values.
Popular conversions
- Bar to Pounds per square inch (psi)
- Pounds per square inch (psi) to Bar
- Pounds per square inch (psi) to Kilopascals
- Kilopascals to Pounds per square inch (psi)
- Megapascals to Pounds per square inch (psi)
- Pounds per square inch (psi) to Megapascals
- Standard atmospheres to Pounds per square inch (psi)
- Pounds per square inch (psi) to Standard atmospheres
- Bar to Kilopascals
- Kilopascals to Bar
- Bar to Standard atmospheres
- Standard atmospheres to Bar
- Millimetres of mercury to Kilopascals
- Kilopascals to Millimetres of mercury
- Millimetres of mercury to Pounds per square inch (psi)
- Pounds per square inch (psi) to Millimetres of mercury
- Inches of mercury to Hectopascals
- Hectopascals to Inches of mercury
- Hectopascals to Millimetres of mercury
- Millimetres of mercury to Hectopascals
- Millibars to Pounds per square inch (psi)
- Pounds per square inch (psi) to Millibars
- Pascals to Pounds per square inch (psi)
- Pounds per square inch (psi) to Pascals
- Kilopascals to Pascals
- Megapascals to Bar
- Bar to Megapascals
- Torr to Pascals
- Torr to Millimetres of mercury
- Kilograms-force per cm² to Bar
- Bar to Kilograms-force per cm²
- Kilograms-force per cm² to Pounds per square inch (psi)
- Centimetres of water to Millimetres of mercury
- Millimetres of mercury to Centimetres of water
- Inches of water to Pascals
- Pascals to Inches of water
- Kilopounds per square inch (ksi) to Megapascals
- Megapascals to Kilopounds per square inch (ksi)
- Standard atmospheres to Kilopascals
- Kilopascals to Standard atmospheres
Questions people ask
How many psi is one bar?
About 14.5038 psi. One psi is about 6894.757 pascals and one bar is exactly 100 000 pascals.
What is standard atmospheric pressure?
Exactly 101 325 Pa, which is 1.01325 bar, 760 Torr or about 14.696 psi.
Is mmHg the same as Torr?
Almost. A Torr is exactly 1/760 of an atmosphere (133.3224 Pa); the conventional mmHg is 133.322387415 Pa. The difference is under one part in seven million.
Factors checked 19 October 2026.