Pressure Converter
Convert between PSI, bar, pascal, kPa, atm, mmHg and more instantly
| Amount | Pascal |
|---|---|
| 1 psi | 6,894.7573 Pa |
| 2 psi | 13,789.515 Pa |
| 5 psi | 34,473.786 Pa |
| 10 psi | 68,947.573 Pa |
| 25 psi | 172,368.93 Pa |
| 50 psi | 344,737.86 Pa |
| 100 psi | 689,475.73 Pa |
| 500 psi | 3,447,378.6 Pa |
| 1,000 psi | 6,894,757.3 Pa |
Pressure Converter: PSI, Bar, Pascal, kPa & More
This free pressure converter changes a pressure reading from one unit to another, instantly and accurately. Convert PSI, bar, pascal, kilopascal, megapascal, hectopascal, millibar, atmosphere, torr, mmHg, inches of mercury and kgf/cm². Pick your units, type a value or move the slider, and the formula, everyday reference pressures and a comparison table update with it.
Quick answer: 1 PSI is 6.8947573 kPa or 0.068947573 bar, 1 bar is 14.503774 PSI, and 1 atmosphere is 101.325 kPa or 14.695949 PSI. So 32 PSI is about 2.206 bar, and 2.5 bar is about 36.26 PSI.
How to Convert Pressure
Pressure conversion multiplies by a fixed factor. To change PSI to kPa, multiply by 6.8947573, and to change bar to PSI, multiply by 14.503774. The converter first turns your value into pascals and then into the unit you chose, so every pair of units works, including mmHg to PSI or kgf/cm² to atm.
| From | To | Multiply by |
|---|---|---|
| PSI | Bar | 0.068947573 |
| Bar | PSI | 14.503774 |
| PSI | Kilopascals | 6.8947573 |
| Kilopascals | PSI | 0.14503774 |
| Atmospheres | PSI | 14.695949 |
| Atmospheres | Kilopascals | 101.325 |
| mmHg | Pascals | 133.32237 |
| Inches of mercury | Kilopascals | 3.386389 |
| kgf/cm² | Bar | 0.980665 |
PSI, Bar and Atmosphere
PSI (pounds per square inch) is the everyday unit in the United States for tires, air tools and water pressure. Bar is common in Europe and in diving, espresso and hydraulics. One bar is 100 kPa, which is close to, but not exactly, one standard atmosphere of 101.325 kPa, a difference of about 1.3%. Weather reports use hectopascals or millibars, where a reading of 1,013.25 hPa equals one atmosphere.
Tire and Everyday Pressures
Most cars call for about 32 to 35 PSI, which is roughly 2.2 to 2.4 bar. Always follow the figure on the label in the driver's door frame or in the owner's manual rather than the number molded into the tire. Here are some common values converted in the tool:
| Everyday pressure | PSI | Bar | Kilopascals |
|---|---|---|---|
| Car tire | 32 psi | 2.21 bar | 220.6 kPa |
| Large SUV or truck tire | 35 psi | 2.41 bar | 241.3 kPa |
| Road bike tire | 100 psi | 6.89 bar | 689.5 kPa |
| Pressure cooker (high setting) | 15 psi | 1.03 bar | 103.4 kPa |
| Espresso machine | 130.5 psi | 9 bar | 900 kPa |
| Sea-level air | 14.7 psi | 1.01 bar | 101.3 kPa |
Gauge Pressure and Absolute Pressure
A tire gauge shows gauge pressure, which is the pressure above the air around it. Absolute pressure counts from a perfect vacuum, so at sea level it is the gauge reading plus about 14.695949 PSI. The converter changes only the number you enter, so add the atmosphere first if a formula or datasheet asks for absolute pressure.
Blood Pressure and Mercury Units
Blood pressure and some weather and vacuum readings use millimeters of mercury. A reading of 120/80 mmHg is 16/10.7 kPa, and 133.32237 pascals make up one mmHg. Torr is almost the same size, as 1 atmosphere is exactly 760 torr.
Pressure, Force and Area
Pressure is force divided by area, and one pascal is one newton on one square meter. To find the area a force acts on, use the area calculator, and for any other measurement the main unit converter lists every converter in one place.
Who Uses a Pressure Converter?
Drivers and cyclists use it to set tire pressure, and divers and brewers use it for cylinders and machines. HVAC and plumbing technicians use it for gauges and supply lines, and engineers use it for hydraulics, pneumatics and datasheets. Students use it for physics and chemistry, and nurses and home users use it for mmHg readings.
How to Use This Pressure Converter
Enter the pressure
Type a number, move the slider, or tap a quick amount like a car tire or sea-level air.
Choose your units
Pick the starting unit and the target unit, or use the PSI, Bar and Pascal shortcuts and the swap button.
Read the result
The answer appears instantly, along with the pressure in PSI, bar, kilopascals and atmospheres.
Explore the extras
Open Formula, Reference, Comparison or Difference to see the factor, everyday pressures or the gap between two readings.