OhMyCalc

Tire Size Calculator

Calculate tire dimensions from width, aspect ratio, and rim diameter. Get tire diameter, sidewall height, circumference, and revolutions per kilometer.

How to Use the Tire Size Calculator

  1. Enter distance, fuel consumption, or vehicle parameters.
  2. Add cost information such as fuel price or electricity rate.
  3. Review the calculated cost, consumption, or comparison.
  4. Adjust values to compare different scenarios.

快速参考

5 L/100 km47 mpg
7 L/100 km33.6 mpg
10 L/100 km23.5 mpg
100 km × 8 L/100 km8 L fuel
500 km × 6 L/100 km30 L fuel
1 kWh~5 km for EV

使用场景

公式

Sidewall = Width × Aspect Ratio / 100. Total Diameter = Rim Diameter × 25.4 + 2 × Sidewall. Circumference = π × Diameter. Revolutions/km = 1,000,000 / Circumference.

常见问题

How to use?
Enter the data and click the calculate button.
Calculation accuracy?
Calculations are performed with high precision.
Is it free?
Yes, all calculators are completely free.