How to convert bars to atmospheres
To convert bars to atmospheres, multiply the value by the conversion factor 0.9869232667. To go the other way, multiply by 1.01325 (or divide by 0.9869232667).
Worked example: 30 bar to atm
- Write the value: 30 bar
- Multiply by 0.9869232667: 30 × 0.9869232667
- Result: 29.6077 atm
Bar to Atmosphere conversion table
Quick reference values, rounded to 6 significant digits.
| Bar (bar) | Atmosphere (atm) |
|---|---|
| 0.1 bar | 0.0986923 atm |
| 0.25 bar | 0.246731 atm |
| 0.5 bar | 0.493462 atm |
| 1 bar | 0.986923 atm |
| 2 bar | 1.97385 atm |
| 3 bar | 2.96077 atm |
| 4 bar | 3.94769 atm |
| 5 bar | 4.93462 atm |
| 6 bar | 5.92154 atm |
| 7 bar | 6.90846 atm |
| 8 bar | 7.89539 atm |
| 9 bar | 8.88231 atm |
| 10 bar | 9.86923 atm |
| 12 bar | 11.8431 atm |
| 15 bar | 14.8038 atm |
| 20 bar | 19.7385 atm |
| 25 bar | 24.6731 atm |
| 30 bar | 29.6077 atm |
| 40 bar | 39.4769 atm |
| 50 bar | 49.3462 atm |
| 75 bar | 74.0192 atm |
| 100 bar | 98.6923 atm |
| 250 bar | 246.731 atm |
| 500 bar | 493.462 atm |
| 1,000 bar | 986.923 atm |
Atmosphere to Bar
| atm | bar |
|---|---|
| 1 atm | 1.01325 bar |
| 5 atm | 5.06625 bar |
| 10 atm | 10.1325 bar |
| 50 atm | 50.6625 bar |
| 100 atm | 101.325 bar |
1 Bar in other pressure units
About Bar and Atmosphere
What is a bar (bar)?
One bar equals 100,000 Pa, close to atmospheric pressure at sea level.
What is a atmosphere (atm)?
A standard atmosphere is 101,325 Pa, the average air pressure at sea level.
Where bar to atmosphere conversion is used
Pressure conversions are needed for tyre pressure, weather, gas cylinders, medical devices and engineering. Converting between bars and atmospheres is especially common when you compare products, read foreign specifications, or fill in forms that expect a specific unit.
Need every unit at once? Use the full Pressure Converter.
Frequently asked questions
How many atmospheres are in 1 bar?
1 Bar equals 0.986923 atm.
How do I convert bars to atmospheres?
Multiply the number of bars by 0.9869232667. For example, 30 bar × 0.9869232667 = 29.6077 atm.
What is 30 bar in atm?
30 bar = 29.6077 atm.
How many bars are in 1 atmosphere?
1 Atmosphere equals 1.01325 bar. Use the ATM to Bar converter for the reverse direction.
Is this Bar to Atmosphere converter accurate?
Yes. It uses exact internationally defined conversion factors, calculated with full floating-point precision. Results are displayed rounded for readability.