atmospheres to millibars
Convert atmosphere to millibar — instant, free, with the formula shown.
How to convert atmosphere to millibar
To convert atmosphere to millibar, multiply by 1013.25:
For example, 10 atm × 1013.25 = 10132.5 mbar.
atm to mbar conversion table
| atmospheres (atm) | millibars (mbar) |
|---|---|
| 1 atm | 1013.25 mbar |
| 2 atm | 2026.5 mbar |
| 5 atm | 5066.25 mbar |
| 10 atm | 10132.5 mbar |
| 25 atm | 25331.25 mbar |
| 50 atm | 50662.5 mbar |
| 100 atm | 101325 mbar |
| 250 atm | 253312.5 mbar |
| 500 atm | 506625 mbar |
| 1000 atm | 1013250 mbar |
Other atmosphere conversions
Convert to millibar from another unit
atm to mbar — frequently asked
How many millibars are in 1 atmosphere?
1 atmosphere = 1013.25 millibars (atm × 1013.25 = mbar).
What is the formula to convert atmosphere to millibar?
Multiply your atmosphere value by 1013.25 to get millibar.
How do I convert 10 atmospheres to millibars?
10 atm = 10132.5 mbar. For 100 atm the answer is 101325 mbar. Use the calculator on this page for any other value.
When to convert atmosphere to millibar
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.