1 bar = 0.986923 atm
1 bar equals 0.986923 standard atmospheres. To convert bars to standard atmospheres, multiply the bar value by 0.986923. For quick reference: 1 bar = 0.986923 atm, 5 bar = 4.93462 atm, 10 bar = 9.86923 atm, 100 bar = 98.6923 atm.
Standard atmospheres = Bars × 0.986923Start with your value in bars.
Multiply the bar value by 0.986923. This is the exact conversion factor from bars to standard atmospheres.
The product is your value in standard atmospheres. For example, 5 bar × 0.986923 = 4.93462 atm.
The exact factor from bars to standard atmospheres is 0.986923.
Standard atmospheres = Bars × 0.986923
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Bars (bar) | Standard atmospheres (atm) |
|---|---|
| 0.001 bar | 0.00098692 atm |
| 0.01 bar | 0.0098692 atm |
| 0.1 bar | 0.098692 atm |
| 0.5 bar | 0.49346 atm |
| 1 bar | 0.98692 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 |
| 7 bar | 6.9085 atm |
| 8 bar | 7.8954 atm |
| 9 bar | 8.8823 atm |
| 10 bar | 9.8692 atm |
| 14 bar | 13.817 atm |
| 15 bar | 14.804 atm |
| 20 bar | 19.738 atm |
| 25 bar | 24.673 atm |
| 30 bar | 29.608 atm |
| 32 bar | 31.582 atm |
| 35 bar | 34.542 atm |
| 40 bar | 39.477 atm |
| 50 bar | 49.346 atm |
| 60 bar | 59.215 atm |
| 75 bar | 74.019 atm |
| 80 bar | 78.954 atm |
| 100 bar | 98.692 atm |
| 101.325 bar | 100 atm |
| 150 bar | 148.04 atm |
| 200 bar | 197.38 atm |
| 250 bar | 246.73 atm |
| 300 bar | 296.08 atm |
| 400 bar | 394.77 atm |
| 500 bar | 493.46 atm |
| 760 bar | 750.06 atm |
| 1000 bar | 986.92 atm |
| 1013.25 bar | 1000 atm |
| 2000 bar | 1973.8 atm |
| 5000 bar | 4934.6 atm |
| 10000 bar | 9869.2 atm |
| 14.7 bar | 14.508 atm |
| 50000 bar | 49346 atm |
| 100000 bar | 98692 atm |
| 101325 bar | 100000 atm |
| 200000 bar | 197385 atm |
| 500000 bar | 493462 atm |
| 1000000 bar | 986923 atm |
| 10000000 bar | 9869233 atm |
Standard atmospheric pressure is about 1.013 bar. A scuba tank is typically filled to 200 bar. In standard atmospheres, that gives you: 1 bar = 0.986923 atm, 10 bar = 9.86923 atm, 100 bar = 98.6923 atm.
The bar equals exactly 100,000 pascals — close to but not equal to standard atmospheric pressure (1 atm = 1.01325 bar). It is the working unit for compressed-air systems, pneumatic tools, dive computers, and weather pressure outside North America.
The standard atmosphere (atm) is defined as exactly 101,325 Pa. It is the conventional reference for chemistry (gas-law calculations), aviation altimetry, and historic engineering. Despite the name, it is not the actual atmospheric pressure at any single place — that varies daily.