Tire Calculator

Calculate tire sidewall, diameter, circumference and revolutions per mile.

What this calculator answers

The Tire Calculator uses the requested values to calculate the requested result. The core method is Related formulas are calculated together from shared inputs.. This makes the assumptions visible so you can check whether the inputs match your situation.

How to get a useful result

Use realistic distance, efficiency, price, speed and financing assumptions rather than best-case values.

How to interpret it

Real travel and vehicle costs can also include taxes, tolls, charging losses, maintenance, insurance, depreciation and traffic.

Before relying on the number

Recheck unusual inputs, confirm units and compare the result with any official quote, statement, specification or rule that applies to the real decision. Small changes in rates, time periods or measurements can materially change some results.