Bar to ATM Converter
Type a value in bar to see it in standard atmospheres as you type, with the exact formula and a reference chart.
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- Atmospheres
- 4.9346 atm
How this was calculated
- 1 standard atmosphere = 1.01325 bar
- 5 ÷ 1.01325 = 4.9346163 atm
| bar | atm |
|---|---|
| 0.5 bar | 0.493462 atm |
| 1 bar | 0.986923 atm |
| 1.01325 bar | 1 atm |
| 1.5 bar | 1.48038 atm |
| 2 bar | 1.97385 atm |
| 3 bar | 2.96077 atm |
| 5 bar | 4.93462 atm |
| 10 bar | 9.86923 atm |
| 20 bar | 19.7385 atm |
| 50 bar | 49.3462 atm |
| 100 bar | 98.6923 atm |
| 200 bar | 197.385 atm |
| 300 bar | 296.077 atm |
| atm | bar |
|---|---|
| 0.5 atm | 0.506625 bar |
| 1 atm | 1.01325 bar |
| 2 atm | 2.0265 bar |
| 5 atm | 5.06625 bar |
| 10 atm | 10.1325 bar |
| 20 atm | 20.265 bar |
| 50 atm | 50.6625 bar |
| 100 atm | 101.325 bar |
| 200 atm | 202.65 bar |
| 500 atm | 506.625 bar |
How to convert bar to standard atmospheres
1 bar = 0.9869232667 standard atmospheres. To convert bar to standard atmospheres, divide by 1.01325 (or multiply by 0.9869232667). A bar is exactly 100,000 pascals, close to one atmosphere (1.01325 bar). One standard atmosphere is exactly 101,325 pascals (101.325 kPa), roughly the air pressure at sea level.
Worked examples
- 1 bar = 0.986923 atm (1 ÷ 1.01325)
- 5 bar = 4.93462 atm (5 ÷ 1.01325)
- 200 bar = 197.385 atm (200 ÷ 1.01325)
Where this conversion comes up
Bar are used for tire pressure in Europe, scuba tanks, espresso machines and weather; standard atmospheres for chemistry, gas laws and diving. Weather maps, diving gauges and chemistry problems mix the two. A standard atmosphere is exactly 1.01325 bar, so 1 bar is 0.98692 atm, close enough that the two are often treated as equal at low pressures but not in precise gas-law calculations. A full scuba tank at 200 bar is 197.4 atm.
Quick estimate
Subtract 1.3%: 10 bar ≈ 9.87 atm.
Common mistakes
- Multiplying instead of dividing. A standard atmosphere is larger than a bar, so the number of standard atmospheres must come out smaller: 1 bar = 0.986923 atm.
- Rounding too early. Keep the full factor until the last step; rounding 0.987 to 0.99 first puts large values noticeably off.
Related pressure converters: bar to psi, psi to bar, kpa to psi, psi to kpa, mpa to psi, psi to mpa.
Frequently asked questions
How do you convert bar to standard atmospheres?
Multiply the bar by 0.9869232667 (or divide by 1.01325). For example, 5 bar is 4.93462 standard atmospheres.
How many standard atmospheres are in one bar?
One bar is 0.9869232667 standard atmospheres. A bar is exactly 100,000 pascals, close to one atmosphere (1.01325 bar).
What is 200 bar in standard atmospheres?
200 bar is 197.385 standard atmospheres.
Is there a quick way to estimate bar to standard atmospheres?
Subtract 1.3%: 10 bar ≈ 9.87 atm.