Pressure Converter

Convert between different pressure units with this easy-to-use converter.

Conversion Result

Common Pressure Conversions

From To Conversion Factor
1 Pascal (Pa) Bar (bar) 0.00001 bar
1 Bar (bar) Pascal (Pa) 100,000 Pa
1 Atmosphere (atm) Pascal (Pa) 101,325 Pa
1 PSI (psi) Pascal (Pa) 6,894.76 Pa
1 Torr (Torr) Pascal (Pa) 133.322 Pa

About Pressure Units

SI Units

Pascal (Pa): The SI unit of pressure. One pascal is equal to one newton per square meter.

Bar (bar): A unit of pressure equal to 100,000 pascals. Commonly used in meteorology and engineering.

Kilopascal (kPa): Equal to 1,000 pascals. Often used in engineering and scientific applications.

Megapascal (MPa): Equal to 1,000,000 pascals. Used for high-pressure applications.

Other Common Units

Atmosphere (atm): The average atmospheric pressure at sea level. One standard atmosphere equals 101,325 pascals.

Pound per Square Inch (psi): A unit of pressure commonly used in the United States. One psi equals 6,894.76 pascals.

Torr (Torr): Named after Evangelista Torricelli. One torr equals 1/760 of a standard atmosphere.

Millimeter of Mercury (mmHg): A unit of pressure based on the height of a mercury column. Used in medicine and meteorology.

Inch of Mercury (inHg): Used in aviation and weather reporting. One inch of mercury equals 3,386.39 pascals.

Frequently Asked Questions

Atmospheric pressure is the pressure exerted by the weight of the atmosphere above a given point. At sea level, it's approximately 101,325 pascals (1.01325 bar or 14.696 psi). This pressure decreases with altitude as there is less air above.

Different fields use different pressure units based on their historical development and practical needs. For example, meteorologists often use millibars (1/1000 of a bar), while tire pressure is typically measured in PSI. The pascal is the SI unit, but other units remain in use for their convenience in specific applications.

Atmospheric pressure decreases exponentially with altitude. At sea level, it's about 101,325 Pa. At 5,000 meters (16,404 feet), it's about 54,000 Pa. At 10,000 meters (32,808 feet), it's about 26,500 Pa. This is why aircraft cabins need to be pressurized to maintain comfortable conditions for passengers.