Atmospheres to Bars Converter

To convert a measurement in atmospheres to bars, multiply the value by 1.01325. The conversion factor comes from the relationship between both units and the pascal.

For example, to convert 5 atm to bars: 5 × 1.01325 = 5.06625 bar.

A standard atmosphere (atm) is a unit of pressure defined as exactly 101,325 pascals, approximating average sea-level air pressure. Defined by the International Union of Pure and Applied Chemistry as a reference pressure, the atmosphere is widely used in chemistry and physics to describe conditions relative to sea level.

Common uses of atmospheres include: Chemistry reference conditions (STP); Diving and hyperbaric medicine; Physics gas-law calculations; Describing high-pressure environments.

A bar is a metric unit of pressure equal to exactly 100,000 pascals, roughly equal to atmospheric pressure at sea level. Introduced by Norwegian meteorologist Vilhelm Bjerknes, the bar takes its name from the Greek 'baros' (weight). Although not an SI unit, it remains popular in industry, diving, and weather because it is close to one atmosphere.

Common uses of bars include: Scuba diving depth and tank pressure; Industrial hydraulics and pneumatics; European tire and automotive pressure; Weather systems (via millibars).

Here are some common values converted:

1 atm = 1.01325 bar 5 atm = 5.06625 bar 10 atm = 10.1325 bar 50 atm = 50.6625 bar 100 atm = 101.325 bar