How does a car track mileage? How does it know how far you’re going?

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How does a car track mileage? How does it know how far you’re going?

In: Engineering
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Math.

The car is aware of how many times the wheels rotate (as it is in control of how of many times the driveshaft turns based on gear and RPMs of the engine). Given that the wheels are a fixed diameter with a fixed circumference, it is simple math to translate how far the car travels for every rotation of the wheels.

Also if you change the size of your wheel, the mileage your car clocks won’t be the actual mileage travelled due to this calculation.