Tire Size Calculator

Tire Comparison

Tire Calculator

Size 1 / R
Size 2 / R
Size 1
Size 2






Size / R






mm inches
Tire Size Visualizer
Tire Front View
Tire Side View
Wheel Side View
Tire Size Comparison Visualizer
Tire 1 Front View
Tire 2 Front View
Tire 1 Side View
Tire 1 Wheel
Tire 2 Side View
Tire 2 Wheel
Speedometer Error
(Set Size1 to OEM Size)


Car tires are the indispensable components of any car. They are able to provide safety on the road, as well as the implementation of technical characteristics that were originally claimed by the manufacturer. Every year, drivers need to change summer tires to winter tires and vice versa. It is recommended to select tires with those sizes that were provided by the car company for this or that car model.

When wear factory tires or just want to put other wheels, the question arises: what sizes of tires will suit my car? The fact is that each car is designed for a specific wheel diameter and width of the tread. Usually, this information is on the back of the gas tank cover or in the operating documents. If you deviate from these sizes by more than 2-3 percent, then the consumption of gasoline will increase, the speedometer will start to lie, and in case of a big difference, driving can become simply dangerous.

However, how to choose tires of the correct size, if in the profile is written some strange figures? Each manufacturer is slightly different in labeling tires from each other. You start entering the request on the Internet: what tires fit my car calculator? It is for this purpose that this wheel and tire calculator is created. It allows you to determine the difference between the tires in centimeters, inches, and percentages.

With our tire size calculator, you can easily calculate the diameter, width, sidewall, circumference, and rpm for any tire. In order to perform the calculation, you only need to enter a metric or standard tire and click on the calculation.

Inch measuring tire is quite easy to pick up and tire to wheel calculator. However, with regard to metric tires, a more sophisticated system is used here for reading. The first number on the metric tire is the width in millimeters. You need to divide this number by 25.4 to get the equivalent in inches. 25.4 mm is 1 inch. The third number, which is usually preceded by an “R,” is the diameter of the wheel. Resistance or aspect ratio is used in metric sizes of tires to determine the overall height of the tire. The second number on the metric tire is the calculation of the sidewall measurement. The height of the sidewall is the width of the tire itself. This second number is the percentage. The height of the sidewall or “aspect ratio” of the tire 285/75 / R16 is 75% of 285 mm.

We bring to your attention the formula for calculating the diameter of a metric tire in inches: (# 1 x # 2/2540 x 2) + (# 3)

Let’s look at an example: 285 / 75R16 (285 × 75/2540 x 2) + 16 = 32.8 inches in height.

In order not to suffer from such calculations, we propose to assign this task to our tire size conversion calculator. You only need to type in the size of any tires and click on the calculation icon. It also solves the problem of determining which tire you would like to start if you have a tire measurement, but cannot find the company that produces this tire size in inches. You will get the tire size comparison visual. Just fill in the measurements of the inches that you are looking for, and it will fill in tire size comparator that is one inch larger and smaller than the entered tire size in inches. In metric tires, there are more options and options, so using a tire size calculator can really be very useful.

The wheel tire calculator measures two tires and tire size calculator compare the diameter, width, sidewall, circumference, and revolutions per mile. It is very efficient to use a tire calculator when looking for tires that differ in size than the stock.

In addition, we would like to remind you once again of the importance of choosing the correct size of tires. Our service is always ready to solve all these problems and complexities with our visual tire calculator, which not only calculates for you real changes in the characteristics of the tires but also warns about the consequences. It will answer the question of what will affect the change of certain tire parameters.