🎈 Pressure Converter
Convert between PSI, bar, pascal, atmospheres and mmHg. Tire pressures, weather systems and medical readings all use different pressure units, 1 bar = 14.5038 psi.
1 Pa = 0.001 kPa
1 pascals = 0.001 kilopascals
1 × 0.001 = 0.001
1 Pa equals 0.001 kPa, so multiplying by 0.001 converts the value. The result describes the exact same quantity, only the measuring stick changes.
Popular pressure conversions
- Pounds per square inch to Bars (psi → bar)
- Bars to Pounds per square inch (bar → psi)
- Kilopascals to Pounds per square inch (kPa → psi)
- Pounds per square inch to Kilopascals (psi → kPa)
- Bars to Kilopascals (bar → kPa)
- Kilopascals to Bars (kPa → bar)
- Atmospheres to Pounds per square inch (atm → psi)
- Millimeters of mercury to Kilopascals (mmHg → kPa)
All pressure units
| Unit | Symbol | Definition |
|---|---|---|
| Pascal | Pa | The pascal (Pa) is the SI unit of pressure, one newton per square meter. It is small in everyday terms: atmospheric pressure is about 101,325 Pa. |
| Kilopascal | kPa | A kilopascal (kPa) is 1,000 pascals. Tire pressures in many countries and weather reports in Canada use kilopascals; standard atmosphere is 101.325 kPa. |
| Megapascal | MPa | A megapascal (MPa) is one million pascals, used for material strength (concrete, steel) and hydraulic systems. |
| Bar | bar | A bar is exactly 100,000 Pa, within 2% of one atmosphere. European tire pressures and scuba tank ratings are given in bar. |
| Pound per square inch | psi | PSI (pound-force per square inch) is the US customary pressure unit, about 6,894.76 Pa. US tire pressures (typically 30-35 psi) and plumbing systems use psi. |
| Atmosphere | atm | A standard atmosphere (atm) is exactly 101,325 Pa, the average sea-level air pressure. Diving depth pressure is often expressed in atmospheres. |
| Torr | Torr | A torr is 1/760 of a standard atmosphere (about 133.322 Pa), essentially equal to one millimeter of mercury. Vacuum systems are specified in torr. |
| Millimeter of mercury | mmHg | A millimeter of mercury (mmHg) is 133.322 Pa. Blood pressure worldwide is measured in mmHg, a healthy reading is around 120/80 mmHg. |
| Inch of mercury | inHg | An inch of mercury (inHg) is 3,386.39 Pa. US weather barometric pressure (~29.92 inHg standard) and aviation altimeter settings use inches of mercury. |
Frequently asked questions
How do I convert pressure units?
Choose your two units in the converter above and type a value, the result updates instantly, entirely in your browser. All 9 pressure units on this page are interchangeable, so you can convert in either direction.
Which pressure units can I convert here?
This converter supports 9 pressure units: Pascal (Pa), Kilopascal (kPa), Megapascal (MPa), Bar (bar) and 5 more. Pick any two to convert between them.
What is the most common pressure conversion?
One of the most-used pressure conversions is Pounds per square inch to Bars (psi → bar). Every pressure pair we support is linked below, each with its own formula and table.
Is this Pressure Converter free and private?
Yes. It is free with no sign-up, uses the exact internationally defined conversion factors, and computes every result locally in your browser, nothing you type is uploaded, and the page keeps working offline.