Formula
atm to mbar conversion formula
Use this relationship for a direct conversion:
mbar = atm x 1,013.25
Worked example
2 atm = 2,026.5 mbar.
Conventional mercury-column units are not measurements adjusted for local temperature or gravity.
Pressure conversion
Convert Standard atmosphere to Millibar
1 standard atmosphere (atm) equals 1,013.25 millibar (mbar). Enter any value below to convert from atm to mbar.
Enter a value and choose units. Results update instantly.
1 atm = 1,013.25 mbar
All Pressure units
From 1 atm| Unit | Value |
|---|---|
| Pascal Pa | 101,325 |
| Kilopascal kPa | 101.325 |
| Megapascal MPa | 0.101325 |
| Bar bar | 1.01325 |
| Millibar mbar | 1,013.25 |
| Standard atmosphere atm | 1 |
| Pound per square inch psi | 14.6959487755 |
| Torr Torr | 760 |
| Millimeter of mercury mmHg | 759.9998917256 |
| Inch of mercury inHg | 29.9212524019 |
Recent conversions
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Quick reference
Standard atmosphere to Millibar table
| Standard atmosphere (atm) | Millibar (mbar) |
|---|---|
| 0.01 | 10.1325 |
| 0.1 | 101.325 |
| 1 | 1,013.25 |
| 2 | 2,026.5 |
| 5 | 5,066.25 |
| 10 | 10,132.5 |
| 25 | 25,331.25 |
| 50 | 50,662.5 |
| 100 | 101,325 |
| 1,000 | 1,013,250 |
From unit
About the standard atmosphere
Exactly 101,325 pascals.
Symbol: atm
To unit
About the millibar
Exactly 100 pascals.
Symbol: mbar
Keep converting
Related conversions
Millibar to Standard atmosphereReverse this conversion Standard atmosphere to Pascalatm to PaStandard atmosphere to Kilopascalatm to kPaStandard atmosphere to Megapascalatm to MPaStandard atmosphere to Baratm to barStandard atmosphere to Pound per square inchatm to psiStandard atmosphere to Torratm to Torr
Source
Conversion standard
Definitions are checked against NIST SP 811: Pressure units. Calculations use full internal precision before display rounding.
View the complete pressure converterQuestions
atm to mbar FAQ
How do you convert standard atmosphere to millibar?
Use the formula mbar = atm x 1,013.25. 1 standard atmosphere (atm) equals 1,013.25 millibar (mbar).
Is the atm to mbar conversion exact?
Both unit definitions use exact factors. Only the displayed decimal may be rounded.