atmospheres to bars
Convert atmosphere to bar — instant, free, with the formula shown.
How to convert atmosphere to bar
To convert atmosphere to bar, multiply by 1.01325:
For example, 10 atm × 1.01325 = 10.1325 bar.
atm to bar conversion table
| atmospheres (atm) | bars (bar) |
|---|---|
| 1 atm | 1.01325 bar |
| 2 atm | 2.0265 bar |
| 5 atm | 5.06625 bar |
| 10 atm | 10.1325 bar |
| 25 atm | 25.33125 bar |
| 50 atm | 50.6625 bar |
| 100 atm | 101.325 bar |
| 250 atm | 253.3125 bar |
| 500 atm | 506.625 bar |
| 1000 atm | 1013.25 bar |
Other atmosphere conversions
Convert to bar from another unit
atm to bar — frequently asked
How many bars are in 1 atmosphere?
1 atmosphere = 1.01325 bars (atm × 1.01325 = bar).
What is the formula to convert atmosphere to bar?
Multiply your atmosphere value by 1.01325 to get bar.
How do I convert 10 atmospheres to bars?
10 atm = 10.1325 bar. For 100 atm the answer is 101.325 bar. Use the calculator on this page for any other value.
When to convert atmosphere to bar
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.