Convert between pascals, bar, psi, and atmospheres.
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Converts pressure between pascals, kPa, bar, psi, atmospheres, mmHg, torr and inHg. The usual reasons are tyre pressures, scuba and gas bottles, blood pressure, and weather barometers.
Every unit is stored in pascals: 1 hPa = 1 mbar = 100 Pa, 1 bar = 100,000 Pa, 1 psi = 6,894.757293 Pa, 1 atm = 101,325 Pa, 1 mmHg = 133.322387 Pa and 1 inHg = 3,386.389 Pa. Weather maps and forecasts give air pressure in hPa or mbar, which are the same size.
A tyre placard of 32 psi is 2.206322 bar, or 220.632233 kPa. Standard sea-level air pressure, 1013.25 hPa, reads 29.921252 inHg on an American barometer.
Gauge. A tyre gauge reads pressure above the surrounding air, so a flat tyre shows 0 even though it holds about 1 atm. Conversions between psi and bar work the same either way.
Almost. 1 torr is exactly 1/760 of an atmosphere, 133.3223684 Pa, and 1 mmHg is 133.322387 Pa. The difference is under one part in a million, so blood pressure in mmHg can be read as torr.
Pressure Converter converts between 10 units: Pa, hPa, mbar, torr, mmHg, kPa, inHg, psi, bar and atm. Factors are given against Pa.
| Unit | In Pa | 1 Pa equals |
|---|---|---|
| 1 hPa | 100 Pa | 0.01 hPa |
| 1 mbar | 100 Pa | 0.01 mbar |
| 1 torr | 133.3223684 Pa | 0.0075006168 torr |
| 1 mmHg | 133.322387 Pa | 0.0075006158 mmHg |
| 1 kPa | 1000 Pa | 0.001 kPa |
| 1 inHg | 3386.389 Pa | 0.0002952998 inHg |
| 1 psi | 6894.757293 Pa | 0.0001450377 psi |
| 1 bar | 100000 Pa | 0.00001 bar |
| 1 atm | 101325 Pa | 0.0000098692 atm |
Common quantities in Pa, converted. Every value is computed from the factors above, so the chart and the converter cannot disagree.
| Pa | hPa | mbar | torr | mmHg |
|---|---|---|---|---|
| 1 Pa | 0.01 | 0.01 | 0.0075006168 | 0.0075006158 |
| 2 Pa | 0.02 | 0.02 | 0.0150012337 | 0.0150012316 |
| 5 Pa | 0.05 | 0.05 | 0.0375030841 | 0.0375030789 |
| 10 Pa | 0.1 | 0.1 | 0.0750061683 | 0.0750061578 |
| 25 Pa | 0.25 | 0.25 | 0.1875154207 | 0.1875153945 |
| 100 Pa | 1 | 1 | 0.7500616828 | 0.7500615782 |
1 Pa is 0.01 hPa. To convert Pa to hPa, divide by 100 — so 10 Pa is 0.1 hPa.
1 hPa is 100 Pa. To convert hPa to Pa, multiply by 100 — so 10 hPa is 1000 Pa.
1 Pa is 0.01 mbar. To convert Pa to mbar, divide by 100 — so 10 Pa is 0.1 mbar.
1 mbar is 100 Pa. To convert mbar to Pa, multiply by 100 — so 10 mbar is 1000 Pa.
1 Pa is 0.0075006168 torr. To convert Pa to torr, divide by 133.3223684 — so 10 Pa is 0.0750061683 torr.
1 torr is 133.3223684 Pa. To convert torr to Pa, multiply by 133.3223684 — so 10 torr is 1333.223684 Pa.
1 Pa is 0.0075006158 mmHg. To convert Pa to mmHg, divide by 133.322387 — so 10 Pa is 0.0750061578 mmHg.
1 mmHg is 133.322387 Pa. To convert mmHg to Pa, multiply by 133.322387 — so 10 mmHg is 1333.22387 Pa.
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