Convert Atmospheres to Bar
atm to bar · pressure conversion
What are atmospheres and bar?
One atmosphere is the average air pressure at sea level, defined as 101,325 Pa. A bar is 100,000 pascals, roughly equal to atmospheric pressure at sea level. For reference: car tires run around 32 psi (220 kPa), and sea-level air pressure is about 101 kPa.
How to convert atmospheres to bar
1 atm = 1.01325 bar. To convert, multiply the number of atmospheres by 1.01325. For example, 5 atm = 5.06625 bar, and 20 atm = 20.265 bar. To go the other way, multiply bar by 0.986923 (since 1 bar = 0.986923 atm).
Atmospheres to Bar conversion table
| Atmospheres (atm) | Bar (bar) |
|---|---|
| 1 | 1.01325 |
| 2 | 2.0265 |
| 5 | 5.06625 |
| 10 | 10.1325 |
| 50 | 50.6625 |
| 100 | 101.325 |
| 1,000 | 1,013.25 |
FAQ
What is 1 atm in bar?
1 atm = 1.01325 bar. To convert any amount, multiply the number of atmospheres by 1.01325.
How do I convert bar back to atmospheres?
Go the other way: 1 bar = 0.986923 atm, so multiply bar by 0.986923 to get atmospheres.
Is a atmosphere bigger than a bar?
Yes — 1 atm is the larger unit, equal to 1.01325 bar.
Are these pressure conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.