Tire Size Calculator

Compare tire sizes and dimensions

Enter tire specifications (e.g. 225/55R16):

Width (mm)

Aspect Ratio (%)

Rim Diameter (in)

Other

View All Other Calculators →

Written by the EachTools Team

Last updated: January 2026

How Tire Size Conversion Works

Tire sizes are expressed as width/aspect ratio/rim diameter (e.g., 225/55R16). This calculator converts between metric, inch, and load index markings.

Steps

Enter your tire size in any format.
View the equivalent sizes in all other formats plus sidewall height and overall diameter.

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