Pressure Converter — Convert PSI, Bar, Pascal, Atmosphere

Frequently Asked Questions

How do I convert PSI to bar?

To convert PSI (pounds per square inch) to bar, multiply by 0.0689476. For example, 30 PSI = 30 × 0.0689476 = 2.068 bar. To convert bar to PSI, multiply by 14.5038.

What is standard atmospheric pressure?

Standard atmospheric pressure (1 atm) is defined as exactly 101,325 pascals, which equals approximately 14.696 PSI, 1.01325 bar, or 760 mmHg (torr).

What is the difference between PSI and kPa?

1 PSI equals approximately 6.89476 kilopascals (kPa). PSI is common in the US (tire pressure, blood pressure equipment), while kPa is used in metric countries for the same applications.

What is mmHg and how does it relate to pressure?

mmHg (millimeters of mercury) measures pressure by how high a column of mercury it can support. It is equivalent to torr. 1 mmHg = 133.322 Pa. Blood pressure is commonly measured in mmHg.

How many pascals are in a bar?

One bar equals exactly 100,000 pascals. The bar is close to (but not exactly) one atmosphere (1 atm = 101,325 Pa). The millibar (mbar) equals 100 pascals and is commonly used in meteorology.