How do I convert bar to psi?

To convert bar to psi, multiply by 14.5038. For example, 2 bar equals approximately 29 psi. This is commonly needed for tire pressure conversions between European and US units.

What is normal atmospheric pressure?

Standard atmospheric pressure at sea level is 101,325 pascals, which equals 1 atmosphere (atm), 1.01325 bar, 14.696 psi, or 760 mmHg. Actual pressure varies with weather and altitude.

How do I convert psi to bar?

To convert psi to bar, multiply by 0.0689476 or divide by 14.5038. For example, 30 psi equals approximately 2.07 bar.

What is blood pressure measured in?

Blood pressure is measured in millimeters of mercury (mmHg). Normal blood pressure is around 120/80 mmHg, where 120 is the systolic (heart beating) and 80 is the diastolic (heart resting) pressure.

What is the difference between bar and psi?

Bar is a metric pressure unit (1 bar = 100,000 Pa), while psi (pounds per square inch) is an imperial unit. 1 bar ≈ 14.5 psi. Bar is common in Europe; psi is standard in the US.

Pression Converter

About Pressure Conversion

Pressure is the force applied perpendicular to a surface per unit area. It's critical in weather forecasting, tire maintenance, scuba diving, industrial processes, medical applications like blood pressure measurement, and aerospace engineering. Understanding pressure conversions is essential for anyone working with pneumatics, hydraulics, or compressed gases.

Multiple pressure units exist for different applications: pascals (Pa) for scientific work and SI compliance, bar for industrial use in Europe, psi (pounds per square inch) in the US for everything from tire pressure to hydraulic systems, atmospheres (atm) as a reference point, and mmHg (millimeters of mercury) for medical measurements and barometric readings.

Our pressure converter handles all common units for both everyday and technical applications, ensuring accurate conversions whether you're checking tire pressure, reading weather data, or working with industrial equipment.

Common Pressure Conversions

From	To	Multiply By
Bar	PSI	14.50
PSI	Bar	0.06895
Atmospheres	Bar	1.013
Bar	Pascals	100,000
PSI	kPa	6.895
mmHg	kPa	0.1333
Atmospheres	mmHg	760
Bar	mmHg	750.1
PSI	Atmospheres	0.06805
kPa	PSI	0.1450

Pressure Unit Reference

Pascal (Pa) – The SI unit of pressure, equal to 1 newton per square meter. Very small unit in practice; kilopascal (kPa) and megapascal (MPa) are more commonly used. Named after Blaise Pascal, who studied fluid pressure.

Bar – Common metric unit equal to 100,000 Pa, very close to 1 atmosphere. Widely used for tire pressure in Europe and industrial applications worldwide. 1 bar = 14.5 psi approximately.

PSI (pounds per square inch) – Primary pressure unit in the US for tire pressure, hydraulics, compressed gases, and industrial equipment. Also written as lbf/in². 1 psi = 6.895 kPa.

Atmosphere (atm) – Reference unit based on average sea-level pressure. 1 atm = 101,325 Pa exactly. Used in diving (depth in atmospheres), gas laws, and as a standard reference pressure.

mmHg (millimeters of mercury) – Traditional unit based on mercury column height. Used for blood pressure, vacuum systems, and barometric pressure. 1 atm = 760 mmHg. Also called torr (1 torr = 1 mmHg).

Kilopascal (kPa) – Practical metric unit equal to 1,000 Pa. Used for tire pressure in some countries, weather pressure, and general industrial use. 1 kPa = 0.145 psi.

Millibar (mbar) – Common in meteorology for atmospheric pressure. 1 mbar = 1 hectopascal (hPa) = 100 Pa. Standard atmospheric pressure ≈ 1013.25 mbar. Weather maps typically show pressure in millibars or hectopascals.

Learn More

Explore our in-depth guides on this topic:

Pression

About Pressure Conversion

Common Pressure Conversions

Pressure Unit Reference

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