Pressure conversion The Pascal (Pa) is the SI unit of pressure and is defined as one Newton per square meter. It is named after the French mathematician Blaise Pascal. Kilopascal (kPa) is equal to 1 000 pascal. Megapascal (MPa) is equal to 1 000 kilopascal or 1 million pascal. Bar is a unit of pressure equal to 100 000 pascal. Pound per square inch (psi) is a unit of pressure commonly used in the United States. It is equivalent to the amount of pressure exerted by one pound of force per square inch of area. Atmosphere (atm) is a unit of pressure that is commonly used to measure atmospheric pressure. It is equivalent to the average air pressure at sea level on Earth. Kilogram-force per square meter is equivalent to the amount of pressure exerted by one kilogram of force per square meter of area. OnlineCalculator.com offers a convenient and easy-to-use tool for converting units of pressure. Whether you need to convert between pascals, kilopascals, bars, or any other unit of pressure, our online calculator can help. Here are some units of pressure: pascal (Pa), kilopascal (kPa), megapascal (MPa), bar, pound per square inch (psi), atmosphere (atm), kilogram-force per square meter, kilogram-force per square centimeter. Below are various pressure unit conversions: Convert pascal to bar Convert bar to pascal Convert bar to psi Convert psi to bar Convert MPa to kg/cm2 Convert kg/cm2 to MPa Convert psi to pa Convert pa to psi Convert psi to mpa Convert mpa to psi