millibars to atmospheres
Convert millibar to atmosphere — instant, free, with the formula shown.
How to convert millibar to atmosphere
To convert millibar to atmosphere, multiply by 0.00098692:
For example, 10 mbar × 0.000987 = 0.009869 atm.
mbar to atm conversion table
| millibars (mbar) | atmospheres (atm) |
|---|---|
| 1 mbar | 0.000987 atm |
| 2 mbar | 0.001974 atm |
| 5 mbar | 0.004935 atm |
| 10 mbar | 0.009869 atm |
| 25 mbar | 0.024673 atm |
| 50 mbar | 0.049346 atm |
| 100 mbar | 0.098692 atm |
| 250 mbar | 0.246731 atm |
| 500 mbar | 0.493462 atm |
| 1000 mbar | 0.986923 atm |
Other millibar conversions
Convert to atmosphere from another unit
mbar to atm — frequently asked
How many atmospheres are in 1 millibar?
1 millibar = 0.000987 atmospheres (mbar × 0.000987 = atm).
What is the formula to convert millibar to atmosphere?
Multiply your millibar value by 0.00098692 to get atmosphere.
How do I convert 10 millibars to atmospheres?
10 mbar = 0.009869 atm. For 100 mbar the answer is 0.098692 atm. Use the calculator on this page for any other value.
When to convert millibar to atmosphere
Pressure conversion — common questions
What's the difference between bar and psi?
1 bar = 100,000 Pa ≈ 14.504 psi. Bar is metric/SI-friendly; psi is US imperial. Tire pressure in cars is commonly 30–35 psi or ≈ 2.1–2.4 bar.
Is 1 atmosphere the same as 1 bar?
Very close but not identical. 1 atm = 1.01325 bar = 101,325 Pa. 1 bar = 100,000 Pa.
Why is blood pressure in mmHg?
Historically measured with mercury manometers — the pressure that supports a column of mercury that many millimetres tall. 120 mmHg systolic ≈ 16 kPa.