Pressure Converter
Convert between pascals, kilopascals, megapascals, bar, millibar, pounds per square inch (psi), standard atmospheres, millimeters of mercury (torr), kilogram-force per square centimeter and inches of mercury. The bar is exactly 100,000 Pa and one atmosphere is exactly 101,325 Pa.
1 pound per square inch = 0.068947573 bar. Formula: bar = psi × 0.068947573 (or psi ÷ 14.503774)
1 pound per square inch in all pressure units
| Pascals (Pa) | 6,894.7573 |
| Kilopascals (kPa) | 6.8947573 |
| Megapascals (MPa) | 0.0068947573 |
| Bar (bar) | 0.068947573 |
| Millibar (mbar) | 68.947573 |
| Atmospheres (atm) | 0.068045964 |
| MmHg (mmHg) | 51.714925 |
| Kgf/cm² (kgf/cm²) | 0.070306958 |
| InHg (inHg) | 2.0360205 |
Pressure units on this page
| Unit | Symbol | 1 unit equals |
|---|---|---|
| Pascal | Pa | 1 Pa |
| Kilopascal | kPa | 1,000 Pa |
| Megapascal | MPa | 1,000,000 Pa |
| Bar | bar | 100,000 Pa |
| Millibar | mbar | 100 Pa |
| Pound per square inch | psi | 6,894.7573 Pa |
| Standard atmosphere | atm | 101,325 Pa |
| Millimeter of mercury (torr) | mmHg | 133.32239 Pa |
| Kilogram-force per cm² | kgf/cm² | 98,066.5 Pa |
| Inch of mercury | inHg | 3,386.389 Pa |
To convert, the value is first expressed in the base unit and then divided by the factor of the target unit, so any pair of units on this page can be converted in one step.
Common pressure conversions
| From | To |
|---|---|
| 1 bar | 14.503774 psi |
| 1 pound per square inch | 0.068947573 bar |
| 1 standard atmosphere | 1.01325 bar |
| 1 bar | 100 kPa |
| 1 kilogram-force per cm² | 14.223343 psi |
| 1 pound per square inch | 6.8947573 kPa |
| 1 standard atmosphere | 759.99989 mmHg |
| 32 psi | 2.2063223 bar |
Tyres, weather and kg to bar
Car tyre pressures are usually 30 to 36 psi, which is 2.1 to 2.5 bar or 207 to 248 kPa. Bicycle tyres run much higher, 60 to 120 psi. Weather reports quote sea-level pressure around 1,013 mbar (hPa), 29.92 inHg or 760 mmHg. The search kg to bar usually means kgf/cm² to bar, the unit on older Asian and European gauges: 1 kgf/cm² is 0.980665 bar, close enough that many people treat them as equal. Blood pressure stays in mmHg everywhere, and 120 mmHg is 16 kPa.
Frequently asked questions
How many psi are in a bar?
14.503774 psi. To convert bar to psi multiply by 14.5; for psi to bar multiply by 0.0689476. The psi to bar page has a tyre-pressure table.
What is kg to bar?
Gauges marked in kg mean kilogram-force per square centimeter. 1 kgf/cm² = 0.980665 bar = 14.223 psi = 98.0665 kPa.
Is 1 bar the same as 1 atmosphere?
Nearly. 1 atm = 1.01325 bar, so a bar is about 1.3% less than standard sea-level pressure.
How do I convert kPa to psi?
Multiply by 0.145038. A 220 kPa tyre is 31.9 psi.
Related calculators
Last updated . Formulas are shown on the page and checked against the worked example.
Conversion factors are exact international definitions where one exists and standard reference values elsewhere. Results are rounded to 8 significant digits.