How to convert atmospheres to bar
To convert atmospheres to bar, multiply by 1.01325. Pressure conversions are used for tire inflation, weather, scuba diving, hydraulics and medical devices.
Atmosphere to Bar conversion table
| Atmosphere (atm) | Bar (bar) |
|---|---|
| 0.1 atm | 0.101325 bar |
| 0.5 atm | 0.506625 bar |
| 1 atm | 1.01325 bar |
| 2 atm | 2.0265 bar |
| 3 atm | 3.03975 bar |
| 4 atm | 4.053 bar |
| 5 atm | 5.06625 bar |
| 10 atm | 10.1325 bar |
| 20 atm | 20.265 bar |
| 25 atm | 25.33125 bar |
| 50 atm | 50.6625 bar |
| 100 atm | 101.325 bar |
| 500 atm | 506.625 bar |
| 1,000 atm | 1,013.25 bar |
About the units
Atmosphere (atm)
A standard atmosphere is defined as exactly 101,325 pascals.
Bar (bar)
A bar equals exactly 100,000 pascals, close to atmospheric pressure at sea level.
How to use this converter
- Type the number of atmospheres (atm) in the input box.
- The result in bar appears instantly — no button needed.
- See the same value in every other pressure unit just below.
- Use “Swap units” to convert bar back to atmospheres.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many bar are in one atmosphere?
One atmosphere equals 1.01325 bar. 1.01325 is the exact factor used by this converter.
How do I convert atmospheres to bar?
Multiply the value in atmospheres by 1.01325. To go the other way, multiply bar by 0.986923266716.
What is 10 atm in bar?
10 atm = 10.1325 bar. Also, 5 atm = 5.06625 bar and 100 atm = 101.325 bar.
What is the difference between a atmosphere and a bar?
A standard atmosphere is defined as exactly 101,325 pascals. A bar equals exactly 100,000 pascals, close to atmospheric pressure at sea level.
Is this tool free and private?
Yes — the Atmosphere to Bar is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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