Millibars to standard atmospheres converter
Standard atmospheres (atm)
1 millibar = 0.0009869232667 standard atmospheres
How to convert millibars to standard atmospheres
atm = mbar × 0.000986923266716
Multiply the number of millibars by 0.000986923266716 to get standard atmospheres. Going the other way, divide by 0.000986923266716 (or multiply by 1013.25).
One millibar is exactly defined as 0.000986923266716 standard atmospheres (to 12 significant figures), and one standard atmosphere is 1013.25 millibars.
Worked examples
- Convert 5 millibars: 5 × 0.000986923266716 = 0.004934616334 0.004934616334 standard atmospheres.
- Convert 12.5 millibars: 12.5 × 0.000986923266716 = 0.01233654083 0.01233654083 standard atmospheres.
- Convert 250 millibars: 250 × 0.000986923266716 = 0.2467308167 0.2467308167 standard atmospheres.
Quick-reference table
| mbar | atm |
|---|---|
| 1 | 0.0009869232667 |
| 2 | 0.001973846533 |
| 3 | 0.0029607698 |
| 5 | 0.004934616334 |
| 10 | 0.009869232667 |
| 15 | 0.014803849 |
| 20 | 0.01973846533 |
| 25 | 0.02467308167 |
| 50 | 0.04934616334 |
| 75 | 0.074019245 |
| 100 | 0.09869232667 |
| 1,000 | 0.9869232667 |
| atm | mbar |
|---|---|
| 1 | 1,013.25 |
| 2 | 2,026.5 |
| 3 | 3,039.75 |
| 5 | 5,066.25 |
| 10 | 10,132.5 |
| 15 | 15,198.75 |
| 20 | 20,265 |
| 25 | 25,331.25 |
| 50 | 50,662.5 |
| 75 | 75,993.75 |
| 100 | 101,325 |
| 1,000 | 1,013,250 |
Related conversions
Frequently asked questions
How many standard atmospheres are in 1 millibar?
1 millibar equals 0.0009869232667 standard atmospheres.
What is the formula to convert millibars to standard atmospheres?
Use atm = mbar × 0.000986923266716. Multiply the number of millibars by 0.000986923266716 to get standard atmospheres. Going the other way, divide by 0.000986923266716 (or multiply by 1013.25).
What is 100 millibars in standard atmospheres?
100 millibars is 0.09869232667 standard atmospheres.