How to Convert Tire Pressure to Metric

by Michael Keenan

Tire pressure represents the inflation level of a car tire. Making sure that your car's tires are properly inflated leads to better gas mileage and longer lasting tires, according to the U.S. Department of Energy. In the United States, tire pressure is measured in terms of pounds per square inch. However, in the metric system, the unit kilopascals is used to express amounts of pressure. To convert to metric pressure units, you need to know your tire's recommended pressure in pounds per square inch.

Look on your car's vehicle information placard to find the recommended tire pressure, measured in pounds per square inch (Psi). You can find the placard on the driver's side door jamb or in the glove box. It will also be listed in your owner's manual.

Divide the recommended Psi pressure by approximately 0.145 to convert from Psi to kPa. For example, if the recommended pressure is 29 Psi, divide 29 by 0.145 to get 200 kPa.

As an alternative method, you can multiply the recommended Psi pressure by 6.895 to convert from Psi to kPa. For example, if the recommended pressure is 29 Psi, multiply 29 by 6.895 to get 200 kPa.

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About the Author

Mark Kennan is a writer based in the Kansas City area, specializing in personal finance and business topics. He has been writing since 2009 and has been published by "Quicken," "TurboTax," and "The Motley Fool."

Photo Credits

  • photo_camera tire image by Orlando Florin Rosu from Fotolia.com