Pressure
bartoatm
Convert bar (bar) to standard atmospheres (atm).
Factor1 bar = 0.9869233 atm
Converter
bar
Accepts numbers or expressions, e.g. 150 + 14.7
Result
atm
Rendered to 6 significant figures.
Formula
Formula
atm = bar × 0.9869233
Multiply any value in bar by 0.9869233 to obtain the value in standard atmospheres.
Worked example
Convert 10 bar to atm.
- 01Start with 10 bar.
- 02Multiply by the conversion factor: 10 × 0.9869233 = 9.86923 atm.
Result10 bar = 9.86923 atm
Conversion table
| bar | atm |
|---|---|
| 1 | 0.98692 |
| 2 | 1.9738 |
| 5 | 4.9346 |
| 10 | 9.8692 |
| 20 | 19.738 |
| 50 | 49.346 |
| 100 | 98.692 |
| 200 | 197.38 |
| 500 | 493.46 |
| 1000 | 986.92 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from bar to atm?
1 bar equals 0.9869233 atm. To convert, multiply the value in bar by 0.9869233.
How do I convert 1 bar to atm?
1 bar = 0.986923 atm. For any value, multiply by 0.9869233.
How do I convert atm back to bar?
Divide by the same factor — or equivalently, multiply by 1.01325. So 1 atm = 1.01325 bar.
When would I need to convert bar to standard atmosphere?
Pressure conversions between bar and atm are common when working with mixed-vendor instrumentation, when piping codes use different units to process datasheets, or when converting field readings into SI for hydraulic calculations.
Is the conversion exact?
Yes. Both bar and atm are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).