Tire Sidewall Calculator

Convert a metric tire width and aspect ratio into sidewall height in millimeters and inches.

Section width (mm)

Aspect ratio (%)

—Sidewall mm

—Sidewall inches

—Two sidewalls

—Sidewall / width

—Sidewall height = section width × aspect ratio ÷ 100.

How to use this Tire Sidewall Calculator

Calculate tire sidewall height from section width and aspect ratio. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.