Pressure Converter
Instantly convert between all major pressure units: pascal, kilopascal, megapascal, bar, psi, atm, mmHg, torr, and inHg. Type in any field.
Pressure Unit Converter
Common Pressure References
| Context | Pa | psi | bar |
|---|---|---|---|
| Standard atmosphere | 101,325 | 14.696 | 1.01325 |
| Car tyre (typical) | 220,632 | 32 | 2.207 |
| Blood pressure (systolic, normal) | 15,999 | 2.32 | 0.160 |
| Bicycle tyre (road) | 620,528 | 90 | 6.205 |
| Scuba tank | 20,684,000 | 3,000 | 206.8 |
| Deep ocean (10,000 m) | ~101,325,000 | ~14,700 | ~1,013 |
Frequently Asked Questions
1 bar = 14.5038 psi. Conversely, 1 psi = 0.0689476 bar. Car tyre pressures are often stated in both: 32 psi = 2.21 bar. Standard atmospheric pressure is 1.01325 bar = 14.696 psi.
1 atm = 101,325 Pa = 101.325 kPa = 1.01325 bar = 14.6959 psi = 760 mmHg = 760 torr = 29.9213 inHg. This is defined as the air pressure at mean sea level.
The torr and mmHg are nearly identical in practice: 1 torr = 133.322 Pa while 1 mmHg = 133.3224 Pa — a difference of only 0.000015%. The torr is exactly 1/760 of 1 atm; mmHg is based on mercury column height. In medicine (blood pressure), mmHg is standard.
Meteorologists use hectopascals (hPa) or millibars (mbar), which are numerically identical: 1 hPa = 1 mbar = 100 Pa. Standard sea-level pressure is 1013.25 hPa. Low-pressure storm systems are typically below 990 hPa; strong high-pressure systems are above 1030 hPa.
Pressure Conversion Factors (to Pascals)
- 1 Pa = 1 Pa (base SI unit)
- 1 kPa = 1,000 Pa
- 1 MPa = 1,000,000 Pa
- 1 bar = 100,000 Pa
- 1 psi = 6,894.76 Pa
- 1 atm = 101,325 Pa
- 1 mmHg = 133.3224 Pa
- 1 torr = 133.322 Pa
- 1 inHg = 3,386.39 Pa
- 1 hPa = 100 Pa (= 1 mbar)