Atmospheres to Millibars Converter
How to convert atmospheres to millibars
millibars = atmospheres × 1,013.25
To convert atmospheres to millibars, multiply the number of atmospheres by 1,013.25.
1 atm = 1,013.25 mbar
Examples
- Standard sea-level atmospheric pressure: 1 atm × 1,013.25 = 1,013.25 mbar
- 2 atm × 1,013.25 = 2,026.5 mbar
Good to know
This is the standard atmosphere (atm), exactly 101,325 Pa. It is not the technical atmosphere (at), which is 1 kgf/cm² or 98,066.5 Pa.
Atmospheres to millibars conversion table
| Atmospheres (atm) | Millibars (mbar) |
|---|---|
| 0.1 atm | 101.325 mbar |
| 0.25 atm | 253.3125 mbar |
| 0.5 atm | 506.625 mbar |
| 0.75 atm | 759.9375 mbar |
| 1 atm | 1,013.25 mbar |
| 1.5 atm | 1,519.875 mbar |
| 2 atm | 2,026.5 mbar |
| 3 atm | 3,039.75 mbar |
| 4 atm | 4,053 mbar |
| 5 atm | 5,066.25 mbar |
| 10 atm | 10,132.5 mbar |
| 20 atm | 20,265 mbar |
| 50 atm | 50,662.5 mbar |
| 100 atm | 101,325 mbar |
Unit definitions
- Atmosphere (atm)
- The standard atmosphere is defined as exactly 101,325 pascals, approximately the average air pressure at sea level. It is used as a reference pressure in chemistry and physics.
- Millibar (mbar)
- A millibar is one thousandth of a bar, exactly 100 pascals, and is identical to the hectopascal. It is used in meteorology for atmospheric pressure.