Atmospheres to Bars converter

To convert atmospheres to bars, enter the value in the first field. The result in bars is calculated automatically using the exact conversion factor.

1 atm = 1.01325 bar
1 bar ≈ 0.986923266716 atm

Formula: bar = atm × 1.01325
atm ≈ bar × 0.986923266716

Definitions: 1 atm = 101325 Pa; 1 bar = 100000 Pa

The standard atmosphere (atm) is exactly 101,325 pascals, the average air pressure at sea level. It is a reference pressure in chemistry and physics and is used to express high pressures as multiples of atmospheric pressure.

The bar equals exactly 100,000 pascals, which is very close to atmospheric pressure at sea level. It is used for tire and gas pressure in Europe, for scuba tanks (water adds about one bar per 10 meters of depth), and in hydraulics and boilers.

See the conversion table with commonly used values, handy for quick reference or study.