# What gas mileage are you getting?

Fill up, note the miles since the last fill-up and the gallons you just bought. See your MPG and what driving costs you.

 Gas mileage

 Fuel per mile

 Fuel per month

 Miles since last fill-up
 Gallons to fill the tank
 Gas price ($ per gallon)
 Miles per month
 Trip distance (miles)

The values filled in are examples. For an accurate figure, fill the tank completely both times and use the trip meter.

## Your fuel costs

## Fuel cost per 100 miles by MPG

At your gas price. Find your car's rated MPG on its window sticker or at fueleconomy.gov.

## How it works

Gas mileage is miles driven ÷ gallons used: when you fill a full tank, the gallons you buy are the gallons you burned since the last full fill-up. Litres per 100 km is 235.2 ÷ MPG. Cost per mile is the gas price ÷ MPG; a trip, a month and a year are that times the miles.

Thinking about an electric car? The [EV charging cost calculator](https://sharpest.ai/tools/ev-charging-cost) compares the same driving at home, public and fast-charger rates.

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As of 2026-11-12. Canonical page: https://sharpest.ai/tools/gas-mileage