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Tyres > Help > Tyres > What is the difference between PSI & BAR & KPA?

What is the difference between PSI & BAR & KPA?


What is PSI?

PSI stands for pounds per square inch. It is a unit of pressure commonly used in the United States and other countries that have not adopted the metric system.

What is BAR?

BAR is a unit of pressure measurement commonly used in Europe and other countries that have adopted the metric system. One BAR is equal to 14.5 PSI.

What is KPA?

KPA stands for kilopascal. It is a unit of pressure commonly used in scientific and engineering applications. One kilopascal is equal to 0.145 PSI or 0.01 BAR.

What is the difference between PSI, BAR, and KPA?

PSI, BAR, and KPA are all units of pressure measurement, but they differ in their scale and applications. PSI is used primarily in the United States, while BAR is used in Europe and other metric countries. KPA is commonly used in scientific and engineering applications. Each unit measures pressure in different increments, with PSI measuring in pounds per square inch, BAR measuring in bars, and KPA measuring in kilopascals.

Which is the most popular unit of pressure measurement?

The popularity of PSI, BAR, and KPA varies depending on the location and industry. In the United States, PSI is the most commonly used unit of pressure measurement. In Europe and other metric countries, BAR is more commonly used for car tyres. KPA is most commonly used in scientific and engineering applications.

KPA, BAR & PSI conversion Table

Here is a full table of BAR to PSI to KPA conversions:

PSI BAR KPA
14.5 1.00 99.97
15 1.03 103.42
20 1.38 137.89
25 1.72 172.37
30 2.07 206.84
35 2.41 241.31
40 2.76 275.79
45 3.10 310.26
50 3.45 344.74
55 3.79 379.21
60 4.14 413.68
65 4.48 448.16
70 4.83 482.63