Convert between Pascal, kPa, bar, atm, PSI, mmHg, and inHg
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Pressure Converter is a free online tool that converts pressure measurements between seven units: Pascal (Pa), kilopascal (kPa), bar, atmosphere (atm), PSI (pounds per square inch), millimeters of mercury (mmHg/Torr), and inches of mercury (inHg). This tool serves engineers, scientists, medical professionals, meteorologists, and anyone working with pressure specifications across different measurement systems. Pressure is force per unit area, and different fields have adopted different units for historical and practical reasons. The Pascal is the SI unit of pressure, with kilopascals used for everyday measurements. Bar is widely used in Europe for tire pressure and weather reports. PSI dominates in the United States for tire pressure, hydraulics, and industrial applications. Atmospheres are used in chemistry and diving. Millimeters and inches of mercury are used in medicine (blood pressure) and meteorology (barometric pressure). Standard atmospheric pressure at sea level is defined as 101,325 Pa = 101.325 kPa = 1.01325 bar = 1 atm = 14.696 psi = 760 mmHg = 29.92 inHg. This reference point connects all pressure units. Enter any pressure value and select the source unit to see instant conversions to all other units. All calculations run in your browser.
Standard atmospheric pressure: 1 atm = 101,325 Pa = 101.325 kPa = 1.01325 bar 1 atm = 14.696 psi = 760 mmHg = 29.921 inHg Other conversions: 1 bar = 100,000 Pa = 14.504 psi = 750.06 mmHg 1 psi = 6,894.76 Pa = 51.715 mmHg 1 mmHg = 133.322 Pa = 0.01934 psi Examples: Tire pressure: 32 psi = 220.6 kPa = 2.206 bar Blood pressure: 120/80 mmHg = 16/10.7 kPa