Pressure Converter

Frequently asked questions

How many psi are in a bar?

One bar equals 14.5037738 psi and is exactly 100,000 pascals. One standard atmosphere is 101,325 pascals, about 14.696 psi. Tyre pressures are usually given in psi or bar, while weather pressure is reported in hectopascals, which equal millibars.

What is the difference between a pascal and a bar?

A pascal (Pa) is the SI base unit of pressure, defined as one newton per square metre. A bar is exactly 100,000 pascals, introduced because the pascal is very small for everyday use. Kilopascals (kPa) are common in engineering reports where bar is not used.

When would I use mmHg instead of other units?

Millimetres of mercury (mmHg), also called Torr, is used in medicine for blood pressure and eye pressure readings, and in chemistry for vacuum and vapour-pressure measurements. One standard atmosphere equals 760 mmHg.

How do I convert bar to psi for a tyre inflator?

Multiply the bar value by 14.5038 to get psi. A typical car tyre is set to around 2.2 to 2.5 bar, which is roughly 32 to 36 psi. Enter your bar value in this converter and select psi as the target unit to see the exact figure.