1 standard atmosphere (atm) = 1.01325 bars (bar). To convert, multiply by 1.01325: bar = atm × 1.01325. For example, 5 atm = 5.06625 bar.
bar = atm × 1.01325
Standard atmospheres to bars table
| Standard atmospheres (atm) | Bars (bar) |
|---|---|
| 1 | 1.01325 |
| 2 | 2.0265 |
| 3 | 3.03975 |
| 4 | 4.053 |
| 5 | 5.06625 |
| 10 | 10.1325 |
| 20 | 20.265 |
| 25 | 25.33125 |
| 50 | 50.6625 |
| 100 | 101.325 |
| 250 | 253.3125 |
| 500 | 506.625 |
| 1,000 | 1,013.25 |
The two units
Standard atmosphere (atm). Exactly 101,325 pascals: average air pressure at sea level.
Bar (bar). Exactly 100,000 pascals, close to atmospheric pressure at sea level.
Because both units are defined in terms of the same base unit, the factor 1.01325 is exact, not a rounded measurement.
Convert standard atmospheres to other units
- Standard atmospheres to pascals — 1 atm = 101,325 Pa
- Standard atmospheres to kilopascals — 1 atm = 101.325 kPa
- Standard atmospheres to pounds per square inch — 1 atm = 14.69594878 psi
- Standard atmospheres to millimeters of mercury — 1 atm = 759.9998917 mmHg
- Standard atmospheres to inches of mercury — 1 atm = 29.92125558 inHg
Convert other units to bars
Questions people ask
- How many bars are in a standard atmosphere?
- 1.01325, exactly.
- How do you convert standard atmospheres to bars?
- bar = atm × 1.01325. It is the same as dividing by 0.9869232667.
- How do you convert bars back to standard atmospheres?
- atm = bar ÷ 1.01325. See bars to standard atmospheres.
Results use the legal definitions of each unit and are checked against the Pint unit library. Display rounds to 10 significant digits. All unit conversions · More tools
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