Convert Bars (bar) to Atmospheres (atm)
Convert bar to atmospheres (atm): 1 atm = 1.01325 bar, so divide bar by 1.01325. The two are almost equal, which is part of why bar is handy.
Formula
1 bar = 0.986923 atm
To convert bar to atm, divide the value by 1.01325.
Conversion Table
| Bars (bar) | Atmospheres (atm) |
|---|---|
| 0.01 bar | 0.0099 atm |
| 0.1 bar | 0.0987 atm |
| 0.5 bar | 0.4935 atm |
| 1 bar | 0.9869 atm |
| 2 bar | 1.9738 atm |
| 3 bar | 2.9608 atm |
| 5 bar | 4.9346 atm |
| 10 bar | 9.8692 atm |
| 15 bar | 14.8038 atm |
| 20 bar | 19.7385 atm |
| 25 bar | 24.6731 atm |
| 50 bar | 49.3462 atm |
| 100 bar | 98.6923 atm |
| 250 bar | 246.7308 atm |
| 500 bar | 493.4616 atm |
| 1000 bar | 986.9233 atm |
| 2500 bar | 2467.3082 atm |
| 5000 bar | 4934.6163 atm |
| 10000 bar | 9869.2327 atm |
| 50000 bar | 49346.1633 atm |
Common bar to atm Examples
- 1 bar = 0.9869 atm
- 5 bar = 4.9346 atm
- 10 bar = 9.8692 atm
- 25 bar = 24.6731 atm
- 50 bar = 49.3462 atm
- 100 bar = 98.6923 atm
- 500 bar = 493.4616 atm
- 1000 bar = 986.9233 atm
About bar to atm
One standard atmosphere is 1.01325 bar, so bar divided by 1.01325 gives atm — 2 bar is about 1.97 atm. Because they are so close, a pressure in bar is roughly the same number in atmospheres.
Bar is widely used for tyres, diving and industry; the atmosphere is a reference equal to sea-level air pressure. For quick estimates, bar and atm are practically interchangeable.
Frequently Asked Questions
Where does the unit atm come from?
Atmospheres is a Pressure unit with its own historical and regional roots, now defined in relation to internationally agreed reference standards.
Where does the unit bar come from?
Bars is a standard Pressure unit used in specific regions or fields. Its definition has been refined over time to match international measurement standards.
What should I check before trusting a bar to atm result?
Confirm the input value, the unit direction (bar to atm, not the reverse), and that the formula 1 bar = 0.986923 atm has been applied.
Why are there different units for Pressure?
Different regions and industries developed their own Pressure standards over time. International trade and science later required conversion tools to bridge them.
How do bar and atm compare in size?
Compare them through the ratio: 1 bar equals 0.986923 atm, which shows directly which unit represents a larger amount of Pressure.
What is a quick way to estimate bar to atm?
Round 0.986923 to one or two significant digits and multiply mentally. Use the exact factor when accuracy matters.