Bar to Atmospheres
Type a value in bar and get atm instantly: 1 bar = 0.9869 atm
1 bar = 0.9869 atm
⇄ Atmosphere → BarThe conversion between bar (bar) and atmospheres (atm) is fixed: 1 bar = 0.9869 atm and 1 atm = 1.0133 bar. To convert bar to atm, multiply by 0.9869; to go the other way, multiply by 1.0133 (or divide by 0.9869). For example, 1 bar = 0.9869 atm and 10 bar = 9.8692 atm.
Enter any value in the converter above; the result updates as you type. You will also find a ready-made table for common values, the formula, and a link to the reverse conversion (atmospheres to bar).
One standard atmosphere is defined as exactly 101,325 Pa = 1.01325 bar, the average air pressure at sea level. The bar (100,000 Pa) is slightly smaller, so 1 bar ≈ 0.98692 atm. Diving depth adds about 1 bar (≈ 0.99 atm) for every 10 m of seawater.
Quick answers
Bar to Atmospheres conversion table
| Bar (bar) | Atmospheres (atm) |
|---|---|
| 0.1 bar | 0.0987 atm |
| 0.5 bar | 0.4935 atm |
| 1 bar | 0.9869 atm |
| 1.5 bar | 1.4804 atm |
| 2 bar | 1.9738 atm |
| 2.5 bar | 2.4673 atm |
| 3 bar | 2.9608 atm |
| 4 bar | 3.9477 atm |
| 5 bar | 4.9346 atm |
| 6 bar | 5.9215 atm |
| 8 bar | 7.8954 atm |
| 10 bar | 9.8692 atm |
| 15 bar | 14.804 atm |
| 20 bar | 19.738 atm |
| 50 bar | 49.346 atm |
| 100 bar | 98.692 atm |
| 200 bar | 197.38 atm |
| 300 bar | 296.08 atm |
Atmospheres to Bar quick table
| Atmospheres (atm) | Bar (bar) |
|---|---|
| 0.5 atm | 0.5066 bar |
| 1.5 atm | 1.5199 bar |
| 2 atm | 2.0265 bar |
| 4 atm | 4.053 bar |
| 5 atm | 5.0663 bar |
| 8 atm | 8.106 bar |
| 10 atm | 10.133 bar |
| 50 atm | 50.663 bar |
| 100 atm | 101.33 bar |
| 1,000 atm | 1,013.25 bar |
Frequently Asked Questions
How many atmospheres are in 1 Bar?
1 bar = 0.9869 atm. Multiply a value in bar by 0.9869 to get atm.
How do I convert atmospheres to bar?
Multiply the value in atm by 1.0133, or divide it by 0.9869. For example, 0.9869 atm ≈ 1 bar.
What is 10 bar in atm?
10 bar = 9.8692 atm.
Is the factor 0.9869 exact?
Both units have exact international definitions, so the factor is fixed; only the displayed value is rounded.