Gigabars to Atmospheres calculator

Gigabars to Atmospheres Conversion Table

Below you can generate and download as CSV, Excel, PDF or print the Gigabars to Atmospheres conversion table based on your needs.

Selected rounding: none (You can change it above in the dropdown)

• Gigabar (100,000,000,000,000 Pa)

  The bar is a metric unit of pressure, but is not approved as part of the International System of Units (SI). It is defined as exactly equal to 100,000 Pa, which is slightly less than the current average atmospheric pressure on Earth at sea level. One Gigabar is equal to 1,000,000,000 bar.

• Atmosphere (101,325 Pa)

  The standard atmosphere (symbol: atm) is a unit of pressure defined as 101325 Pa (1.01325 bar). It is sometimes used as a reference or standard pressure. It was originally defined as the pressure exerted by 760 mm of mercury at 0 °C and standard gravity (g = 9.80665 m/s2). It was used as a reference condition for physical and chemical properties, and was implicit in the definition of the Centigrade (later Celsius) scale of temperature by defining 100 °C as being the boiling point of water at this pressure. In 1954, the 10th Conférence Générale des Poids et Mesures (CGPM) adopted standard atmosphere for general use and affirmed its definition of being precisely equal to 1013250 dynes per square centimetre (101325 Pa).