Convert Millibar (mbar) to Atmospheres (atm)

Enter a value below to convert Millibar (mbar) to Atmospheres (atm).

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Conversion:

1 Millibar (mbar) = 0.00098692326672 Atmospheres (atm)

How to Convert Millibar (mbar) to Atmospheres (atm)

1 mbar = 0.00098692326672 atm

1 atm = 1013.25 mbar

Example: convert 15 Millibar (mbar) to Atmospheres (atm):

25 mbar = 0.024673081668 atm

Millibar (mbar) to Atmospheres (atm) Conversion Table

Millibar (mbar)Atmospheres (atm)
0.01 mbar0.0000098692326672 atm
0.1 mbar0.000098692326672 atm
1 mbar0.00098692326672 atm
2 mbar0.0019738465334 atm
3 mbar0.0029607698001 atm
5 mbar0.0049346163336 atm
10 mbar0.0098692326672 atm
20 mbar0.019738465334 atm
50 mbar0.049346163336 atm
100 mbar0.098692326672 atm
1000 mbar0.98692326672 atm

Millibar (mbar)

Definition

A millibar (mbar) is a unit of pressure equal to one thousandth of a bar, or 100 pascals. It is equivalent to one hectopascal (hPa).

History

The millibar was widely adopted in meteorology in the early 20th century for measuring atmospheric pressure. Many weather services have since transitioned to the equivalent hectopascal (hPa), though millibar remains in common use.

Current use

Millibars are used in meteorology for atmospheric pressure readings, aviation altimeter settings, and weather maps. Many weather forecasts and barometers still display pressure in millibars.

Atmospheres (atm)

Definition

A standard atmosphere (atm) is a unit of pressure defined as exactly 101,325 pascals. It represents the average atmospheric pressure at sea level.

History

The standard atmosphere was defined in 1954 as a reference standard for pressure. It was historically based on mercury barometer readings and the average weight of the Earth's atmosphere at sea level.

Current use

Atmospheres are used in chemistry (standard conditions for gas calculations), diving (dive depth pressure ratings), and as a reference point for comparing relative pressures across different systems.