Convert Atmospheres (atm) to Millibar (mbar)
Enter a value below to convert Atmospheres (atm) to Millibar (mbar).
Conversion:
1 Atmospheres (atm) = 1013.25 Millibar (mbar)
How to Convert Atmospheres (atm) to Millibar (mbar)
1 atm = 1013.25 mbar
1 mbar = 0.00098692326672 atm
Example: convert 15 Atmospheres (atm) to Millibar (mbar):
25 atm = 25331.25 mbar
Atmospheres (atm) to Millibar (mbar) Conversion Table
| Atmospheres (atm) | Millibar (mbar) |
|---|---|
| 0.01 atm | 10.1325 mbar |
| 0.1 atm | 101.325 mbar |
| 1 atm | 1013.25 mbar |
| 2 atm | 2026.5 mbar |
| 3 atm | 3039.75 mbar |
| 5 atm | 5066.25 mbar |
| 10 atm | 10132.5 mbar |
| 20 atm | 20265 mbar |
| 50 atm | 50662.5 mbar |
| 100 atm | 101325 mbar |
| 1000 atm | 1013250 mbar |
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.
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.