Pressure Converter
Force per area - pascals, bars, psi, atmospheres.
Enter a value above to convert between bar and psi.
How to convert pressure units
Pressure is based on the pascal (one pascal is one newton per square meter). The common units relate as: 1 bar = 100,000 Pa, 1 atmosphere = 101,325 Pa, and 1 psi = 6,894.76 Pa. Meteorologists use the hectopascal (hPa), which equals the millibar.
Worked example
A 32 psi tyre is 32 × 6894.76 = 220,632 Pa = 2.21 bar. Standard atmospheric pressure is one atmosphere, which is 1013.25 hPa = 14.696 psi.
What is 1 atmosphere in pascals?
One standard atmosphere equals 101,325 pascals, which is 1013.25 hPa (millibar) or 14.696 psi. One bar equals 100,000 Pa, one psi equals 6,894.76 Pa, and one millimeter of mercury equals 133.322 Pa.
When you'll use a pressure converter
Pressure conversion is useful for tyre pressure (psi, bar, kPa), weather (hectopascals, atmospheres, mmHg), diving, engineering, and blood pressure (mmHg). The table above lists your value in all 7 supported units at once.
Common pressure conversions
Quick-reference rates for common pressure conversions - bar, psi, pascals, kilopascals and atmospheres, one unit at a time.
| From | To |
|---|---|
| 1 bar (bar) | 14.5038 psi |
| 1 psi (psi) | 0.0689 bar |
| 1 atmosphere (atm) | 14.6959 psi |
| 1 psi (psi) | 6,894.7573 Pa |
| 1 bar (bar) | 100,000 Pa |
| 1 kilopascal (kPa) | 0.145 psi |
| 1 atmosphere (atm) | 101.325 kPa |
| 1 millimeter mercury (mmHg) | 133.3224 Pa |
| 1 bar (bar) | 0.9869 atm |
| 1 atmosphere (atm) | 1.0132 bar |
| 1 psi (psi) | 6.8948 kPa |
Frequently asked questions
How many psi are in a bar?
One bar equals about 14.5038 psi, because 1 bar is 100,000 Pa and 1 psi is 6,894.76 Pa. Dividing 100,000 by 6,894.76 gives roughly 14.5 psi per bar.
What is a pascal?
A pascal (Pa) is the SI unit of pressure, defined as one newton of force spread over one square meter. It is a small unit, so everyday pressures are usually shown in kilopascals, bar, or psi.
How do I convert psi to kPa?
Multiply the psi value by 6.89476 to get kilopascals, since 1 psi equals 6,894.76 Pa, which is 6.89476 kPa. For example, 30 psi is about 206.8 kPa.
How many mmHg are in one atmosphere?
One standard atmosphere equals about 760 mmHg, because 1 atm is 101,325 Pa and 1 mmHg is 133.322 Pa. Dividing 101,325 by 133.322 gives roughly 760 millimeters of mercury.
Is a bar bigger than a psi?
Yes, one bar is much larger than one psi. A bar is 100,000 Pa while a psi is only 6,894.76 Pa, so one bar equals about 14.5 psi.
How do I convert kPa to mmHg?
Multiply the kilopascal value by 7.50062 to get mmHg, because 1 kPa is 1,000 Pa and 1 mmHg is 133.322 Pa. For instance, 10 kPa is about 75 mmHg.
Popular pressure conversions
Quick links to popular pressure conversions - tap any pair to open the converter ready to go.