Atmospheres to Millibars Converter
Convert atmospheres (atm) to millibars (mbar)
Result
1,013.25 mbar
Millibars
1 atm = 1,013.25 mbar
1 atm in other units
- 1Enter a valueType the number to convert
- 2Pick the unitsChoose what to convert from and to
- 3Read the resultSee it in every other unit too
How to convert atmospheres to millibars
One standard atmosphere equals 1,013.25 millibars, so multiply the number of atmospheres by 1,013.25.
mbar = atm × 1,013.25
1 atm = 1,013.25 mbar · 1 mbar = 0.0009869233 atm
Worked example
To convert 5 atmospheres to millibars: 5 atm × 1,013.25 = 5,066.25 mbar.
About atmospheres (atm)
A standard atmosphere is exactly 101,325 Pa, the average air pressure at sea level.
About millibars (mbar)
A millibar is one thousandth of a bar (equal to a hectopascal), used in weather maps.
More conversions
Atmospheres to other units
Frequently asked questions
How many millibars are in one standard atmosphere?
One standard atmosphere equals 1,013.25 millibars.
How many atmospheres are in one millibar?
One millibar equals 0.0009869233 atmospheres.
How do I convert atmospheres to millibars?
Use the formula mbar = atm × 1,013.25. For example, 5 atm × 1,013.25 = 5,066.25 mbar.