Use our tire calculator to calculate the diameter, width, sidewall, circumference, and revolutions per mile of any tire. Just type in a metric or standard size tire and click calculate. Browse tires by vehicle by choosing your options from the lists.
Inch measurement tires are fairly easy to understand however metric tires use a more difficult system to read. The first number on a metric tire is the width. Divide this by 25.4 to get inch equivalent. The third number generally preceded by an "R" is the wheel diameter. The sidewall and aspect ratio are used in metric sized tires to determine the overall height of a tire. The second number on a metric tire is to calculate the side wall measurement. The sidewall height is a percentage of the width of the tire. This second number is that percent.
Our tire calculator does these calculations for you. Just type in the metric fields and click calculate. It also solves the problem of deciding what tire you would like to run if you have inch measurements in mind but can't find a company that manufactures that inch size tire. Just fill in the inch measurements you are looking for and it will calculate and it will display tire suggestions of available tire sizes. There are many more possibilities and choices in metric tires so the use of a tire calculator can come in handy.
The tire size comparison calculator
takes the measurements of two tires and compares the diameter, width, sidewall, circumference, and revolutions per mile. Then as a bonus it shows examples of your speedometer reading with the first tire, and the actual speed you're traveling if you were to install the second tire. A very useful tire calculator when searching for tires that are a different size then stock.
A tire size conversion calculator or tire diameter calculator are the best ways to get the answers you are looking for. What sets us apart is our tire suggestion guide. For each tire size you input our tire calculator suggests multiple tire sizes that are with in one inch bigger and smaller of the entered tire size. Making it as simple as possible to find the tire that is just right for you.
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