Question 1

How is MPG calculated?

Accepted Answer

MPG = miles driven / gallons used. For metric, L/100 km = 235.215 / MPG (US gallon).

Question 2

What is a good MPG?

Accepted Answer

Depends on vehicle type and driving; higher MPG means better efficiency. For EVs, use Wh/mi or MPGe.

Question 3

How do I track MPG accurately?

Accepted Answer

Fill to first click each time, reset trip odometer, and record gallons added; average over multiple tanks.

Question 4

Why does MPG vary?

Accepted Answer

Speed, traffic, temperature, AC, tires, load, and route profile all influence fuel use.

Question 5

Can I estimate cost per mile?

Accepted Answer

Yes—multiply gallons by price to get trip cost and divide by miles for cost per mile.

MPG Calculator