Pressure Converter
Convert pressure units: Pa, kPa, bar, psi, atm, hPa, and mmHg
Full Pressure Conversion Table
Pascal (Pa)
100
Kilopascal (kPa)
0.1
Hectopascal (hPa)
1
Bar (bar)
0.001
Millibar (mbar)
1
PSI (psi)
0.01450377439
Atmosphere (atm)
0.0009869232667
Millimeter of Mercury (mmHg)
0.7500637554
How to Convert Pressure
Enter the pressure value and select units. Instantly calculates bar↔psi, hPa↔atm, and more.
What are bar, psi, and hPa?
Pascal (Pa) is the SI pressure unit. 1 atm = 101,325 Pa, 1 bar = 100,000 Pa, 1 psi = 6,894.76 Pa, 1 hPa (hectopascal) is used in meteorology.
Frequently Asked Questions
How many Pa is 1 atmosphere (atm)?
1 atmosphere (atm) is exactly 101,325 pascals (Pa).
How many psi is 1 bar?
1 bar is approximately 14.5038 psi.
What unit is used for tire pressure?
Tire pressure is usually shown in psi (US) or bar (Europe). 1 bar = 14.5 psi.
What is the difference between hPa and mbar?
1 hPa = 1 mbar. Atmospheric pressure in weather forecasts is expressed in hPa or mbar.
What is the blood pressure unit mmHg?
mmHg (millimeter of mercury) is used in medicine to measure blood pressure. 1 mmHg = 133.322 Pa.