Pressure Converter — bar to psi, psi to bar, atm to kPa, kPa to psi
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Pressure Conversions — bar to psi, psi to bar, atm to kPa, kPa to psi

Quick pressure conversions commonly used for tire pressure, engineering, scuba diving, and scientific applications. Convert bar to psi, psi to bar, atm to kPa, kPa to psi, MPa to bar, torr to atm and more.

Unit descriptions

Bar (bar)

Metric pressure unit widely used in Europe. 1 bar = 100,000 Pa = approximately atmospheric pressure at sea level. Common for tire pressure and weather.

Pounds per square inch (psi)

Imperial pressure unit used in the US and UK. 1 psi = 6,894.76 Pa. Standard for tire pressure, scuba tanks, and industrial systems.

Atmosphere (atm)

Standard atmospheric pressure at sea level. 1 atm = 101,325 Pa = 14.6959 psi. Used in chemistry, physics, and meteorology.

Kilopascal (kPa)

SI unit of pressure. 1 kPa = 1,000 Pa. Common in engineering, weather reports, and scientific measurements. 101.325 kPa = 1 atm.

Torr

Named after Evangelista Torricelli. 1 Torr = 1/760 atm ≈ 133.322 Pa. Used in vacuum measurements and barometric pressure.

Browse Pressure Conversions

Bar PSI Atmosphere Kilopascal Megapascal Torr inHg

Pressure Conversion Tables

1 bar
= 14.503773773 psi · = 0.9869232667 atm · = 100 kPa
1 psi
= 0.0689475729 bar · = 0.0680459639 atm · = 6.89475729 kPa
1 atm
= 1.01325 bar · = 14.6959487755 psi · = 101.325 kPa
1 kPa
= 0.01 bar · = 0.1450377377 psi · = 0.0098692327 atm
1 MPa
= 10 bar · = 145.03773773 psi · = 1,000 kPa
1 Torr
= 0.0013332237 bar · = 0.0193367747 psi · = 0.1333223684 kPa
1 inHg
= 0.0338638867 bar · = 0.4911540772 psi · = 3.38638867 kPa

Common Pressure Conversions

Car tire pressure
32 psi = 2.21 bar = 221 kPa
Bicycle tire pressure
65 psi = 4.48 bar = 448 kPa
Standard atmosphere
1 atm = 101.325 kPa = 14.696 psi = 760 Torr
Scuba tank pressure
200 bar = 2,900 psi = 20,000 kPa
Weather (sea level)
1013.25 mbar = 29.92 inHg = 14.696 psi
Hydraulic systems
3000 psi = 206.8 bar = 20,684 kPa

Pressure in Different Applications

Automotive
PSI (US), Bar (Europe) for tire pressure
Weather
mbar/hPa, inHg (US), kPa (Canada)
Scuba Diving
Bar (Europe), PSI (US) for tank pressure
Engineering
MPa for materials, kPa for fluids
Medical/Vacuum
Torr, mmHg for blood pressure and vacuum
Industrial
PSI for compressed air, Bar for hydraulic

Pressure Reference Points

Atmospheric pressure
1 atm = 101.325 kPa = 14.696 psi
Water pressure at 10m depth
≈ 1 bar ≈ 14.5 psi ≈ 100 kPa
Perfect vacuum
0 bar = 0 psi = 0 kPa (absolute)
Blood pressure (normal)
120/80 mmHg = 16/10.7 kPa = 2.32/1.55 psi
Deep ocean (Mariana Trench)
≈ 1,100 bar ≈ 16,000 psi ≈ 110 MPa

Note: Pressure can be expressed as absolute pressure (relative to vacuum) or gauge pressure (relative to atmospheric). Most tire pressures are gauge pressure (psi or bar). In scientific contexts, absolute pressure is typically used.

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