The mpg number on your car’s window sticker comes from a lab test cycle, not your actual commute. Our MPG calculator turns the classic “fill to full” method into an instant result:
- Instant — your real mpg updates as you type; nothing is submitted anywhere.
- Honest — the FAQ explains exactly why real-world mileage drifts from the EPA estimate, and what actually moves the number.
- Practical — add a gas price and it shows your cost per mile too, handy for comparing trips or commutes.
- Shareable — your inputs live in the link, so you can save or send a result without retyping it later.
Enter a start reading of 45,000 miles, an end reading of 45,350, and 12.5 gallons to refill, and you’ll get 350 miles driven at 28.0 mpg — about 12.5 cents a mile at $3.50 gas. Once you know your real number, plug it into our fuel cost calculator to price out your next trip.
It’s also embeddable on your own site with one iframe.