Popular pressure conversions
- Pounds per square inch to bars1 psi = 0.0689476 bar
- Pounds per square inch to kilopascals1 psi = 6.89476 kPa
- Pounds per square inch to atmospheres1 psi = 0.068046 atm
- Pounds per square inch to millimeters of mercury1 psi = 51.7149 mmHg
- Pounds per square inch to pascals1 psi = 6,894.76 Pa
- Bars to pounds per square inch1 bar = 14.5038 psi
- Bars to kilopascals1 bar = 100 kPa
- Bars to atmospheres1 bar = 0.986923 atm
- Bars to millimeters of mercury1 bar = 750.062 mmHg
- Bars to pascals1 bar = 100,000 Pa
- Kilopascals to pounds per square inch1 kPa = 0.145038 psi
- Kilopascals to bars1 kPa = 0.01 bar
- Kilopascals to atmospheres1 kPa = 0.00986923 atm
- Kilopascals to millimeters of mercury1 kPa = 7.50062 mmHg
- Kilopascals to pascals1 kPa = 1,000 Pa
- Atmospheres to pounds per square inch1 atm = 14.6959 psi
- Atmospheres to bars1 atm = 1.01325 bar
- Atmospheres to kilopascals1 atm = 101.325 kPa
- Atmospheres to millimeters of mercury1 atm = 760 mmHg
- Atmospheres to pascals1 atm = 101,325 Pa
- Millimeters of mercury to pounds per square inch1 mmHg = 0.0193368 psi
- Millimeters of mercury to bars1 mmHg = 0.00133322 bar
- Millimeters of mercury to kilopascals1 mmHg = 0.133322 kPa
- Millimeters of mercury to atmospheres1 mmHg = 0.00131579 atm
- Millimeters of mercury to pascals1 mmHg = 133.322 Pa
- Pascals to pounds per square inch1 Pa = 0.000145038 psi
- Pascals to bars1 Pa = 0.00001 bar
- Pascals to kilopascals1 Pa = 0.001 kPa
- Pascals to atmospheres1 Pa = 0.00000986923 atm
- Pascals to millimeters of mercury1 Pa = 0.00750062 mmHg
- Hectopascals to inches of mercury1 hPa = 0.02953 inHg
- Inches of mercury to hectopascals1 inHg = 33.8639 hPa
- Megapascals to pounds per square inch1 MPa = 145.038 psi
- Pounds per square inch to megapascals1 psi = 0.00689476 MPa
- Inches of water to pascals1 inH₂O = 249.089 Pa
- Pascals to inches of water1 Pa = 0.00401463 inH₂O
- Millibars to pounds per square inch1 mbar = 0.0145038 psi
- Pounds per square inch to millibars1 psi = 68.9476 mbar
About pressure units
Pressure is force per unit area; the SI unit, the pascal, is one newton per square metre. Tire and hydraulic pressures are given in psi or bar, weather in hectopascals or inches of mercury, blood pressure in mmHg. Gauge pressure (psig) is measured relative to the atmosphere and absolute pressure (psia) relative to vacuum — the units convert the same way, but the reference does not change.
Pressure unit reference
| Unit | Symbol | Value in Pa | System |
|---|---|---|---|
| Pascal | Pa | 1 Pa | SI |
| Hectopascal | hPa | 100 Pa | SI |
| Kilopascal | kPa | 1,000 Pa | SI |
| Megapascal | MPa | 1,000,000 Pa | SI |
| Gigapascal | GPa | 1,000,000,000 Pa | SI |
| Bar | bar | 100,000 Pa | Metric |
| Millibar | mbar | 100 Pa | Metric |
| Standard atmosphere | atm | 101,325 Pa | Other |
| Technical atmosphere | at | 98,066.5 Pa | Other |
| Kilogram-force per square centimeter | kgf/cm² | 98,066.5 Pa | Other |
| Pound per square inch | psi | 6,894.7573 Pa | US customary |
| Kilopound per square inch | ksi | 6,894,757.3 Pa | US customary |
| Pound per square foot | psf | 47.880259 Pa | US customary |
| Torr | Torr | 133.32237 Pa | Other |
| Millimeter of mercury | mmHg | 133.32239 Pa | Other |
| Inch of mercury | inHg | 3,386.3886 Pa | US customary |
| Centimeter of water | cmH₂O | 98.0665 Pa | Other |
| Millimeter of water | mmH₂O | 9.80665 Pa | Other |
| Inch of water | inH₂O | 249.08891 Pa | US customary |
| Dyne per square centimeter | dyn/cm² | 0.1 Pa | CGS |
Frequently asked questions
What is the SI unit of pressure?
This converter uses the pascal (Pa) as its reference unit; every other unit is defined relative to it.
How many pressure units can I convert?
20 units are supported here, across SI, Metric, Other, US customary, CGS systems. Every pair can be converted in both directions.
Does this pressure converter work offline?
Yes. Once the page has loaded, every calculation runs locally in your browser — nothing is sent to a server.