atm to mbar converter
1 atm = 1,013.25 mbar
And 1 mbar = 0.000986923 atm. Standard atmosphere to millibar.
Formula
mbar = atm × 1,013.25
A reading of 15 atm is 15 × 1,013.25 = 15,198.8 mbar.
atm to mbar table
| atm | mbar |
|---|---|
| 1 atm | 1,013.25 mbar |
| 5 atm | 5,066.25 mbar |
| 10 atm | 10,132.5 mbar |
| 15 atm | 15,198.8 mbar |
| 30 atm | 30,397.5 mbar |
| 50 atm | 50,662.5 mbar |
| 100 atm | 101,325 mbar |
| 500 atm | 506,625 mbar |
| 1,000 atm | 1,013,250 mbar |
mbar to atm table
| mbar | atm |
|---|---|
| 1 mbar | 0.000986923 atm |
| 5 mbar | 0.00493462 atm |
| 10 mbar | 0.00986923 atm |
| 15 mbar | 0.0148038 atm |
| 30 mbar | 0.0296077 atm |
| 50 mbar | 0.0493462 atm |
About these units
atm (standard atmosphere): Defined as 101,325 Pa, roughly sea-level air pressure.
mbar (millibar): Used for weather, vacuum and low differential pressures.
Gauge pressure (psig, barg) is measured relative to the surrounding atmosphere; absolute pressure (psia, bara) is relative to vacuum. Converting units never changes that reference: absolute = gauge + about 14.696 psi (1.01325 bar) at sea level. Stress uses the same units: 1 MPa = 1 N/mm².
Convert mbar to atm instead · All pressure and stress conversions