Tire Overall Diameter and Circumference Calculator
Calculate the overall diameter and circumference from the tire size.
mm
%
inch
Result
631,9 mm
Overall diameter: 631,9 mm (63,19 cm)
Result in all units
Step-by-step solution
What Is Tire Size?
Tire size is the width, aspect ratio and rim diameter information printed on the tire sidewall (for example 205/55 R16). This tool calculates the total diameter and circumference of the tire.
How is it calculated?
How Is It Calculated?
Total diameter = rim diameter + 2 × (width × aspect ratio ÷ 100)
- Enter the width, aspect ratio and rim values.
- Circumference = π × total diameter.
Frequently Asked Questions
Can I fit a different size tire?
The overall diameter should stay close; a very different diameter affects the speedometer and the vehicle's behavior.