Pressure Converter
Convert between PSI, bar, atm, and more.
Ctrl+Enter to convert from first field
Standard Atmosphere Equivalents
| Unit | 1 atm = |
|---|---|
| Pascal (Pa) | 101,325 |
| Kilopascal (kPa) | 101.325 |
| Bar | 1.01325 |
| Millibar (mbar) | 1013.25 |
| PSI | 14.6959 |
| mmHg / Torr | 760 |
| inHg | 29.9213 |
Frequently Asked Questions
How do I convert PSI to bar? +
Multiply PSI by 0.0689476 to get bar. For example, 30 PSI equals about 2.07 bar. Tire pressures are commonly listed in PSI (US) or bar (Europe).
What is standard atmospheric pressure? +
Standard atmospheric pressure (1 atm) equals 101,325 Pa, 1013.25 mbar, 14.696 PSI, 760 mmHg, or 29.9213 inHg. This is the average air pressure at sea level.
Are mmHg and torr the same thing? +
They are nearly identical. One torr is defined as exactly 1/760 of an atmosphere, while 1 mmHg is based on the physical column of mercury. The difference is less than 0.000015%, so they are treated as equal for practical purposes.
What is the relationship between bar and Pascal? +
One bar equals exactly 100,000 Pascals (100 kPa). The bar is commonly used in weather forecasting and industrial settings because it is close to 1 atmosphere (1 atm = 1.01325 bar).