How to Calculate MPG
The formula is simple: miles driven ÷ gallons used = MPG. The tricky part is measuring it accurately. Here's the reliable way to do it:
- Fill your tank all the way and either reset your trip meter or write down your odometer reading.
- Drive normally until you're ready to fill up again.
- Fill the tank all the way again, and note how many gallons it took (it's on the pump).
- Note the miles you drove since the last fill-up.
- Divide the miles by the gallons. That's your real MPG.
For the most accurate number, do this over a full tank rather than a short trip, and fill to the same click-off point both times.
What's a Good MPG?
It depends entirely on what you drive. Here's a rough guide for 2026 vehicles:
| Vehicle Type | Typical MPG | Good MPG |
|---|---|---|
| Compact / small sedan | 28–35 | 35+ |
| Midsize sedan | 25–32 | 32+ |
| SUV / crossover | 22–28 | 28+ |
| Pickup truck | 18–24 | 24+ |
| Hybrid | 40–55 | 50+ |
Why Your Real MPG May Be Lower Than the Sticker
If your number came out lower than the EPA rating on the window sticker, that's completely normal. Those ratings come from controlled lab tests. Real driving includes things that hurt mileage: city stop-and-go traffic, cold weather, short trips, hard acceleration, low tire pressure, extra cargo weight, and running the AC. Being 10–20% below the sticker is typical.
How to Improve Your MPG
- Keep tires properly inflated — underinflation is one of the biggest silent mileage killers.
- Ease off hard acceleration and braking — smooth driving can improve mileage noticeably.
- Remove extra weight and roof racks when you don't need them.
- Use cruise control on highways to hold a steady speed.
- Keep up with maintenance — a clean air filter and fresh oil help.
- Once you know your MPG, plug it into our Trip Cost Calculator to estimate any road trip's gas cost.
Frequently Asked Questions
How do I calculate my car's MPG?
Fill your tank and reset your trip meter. Drive until you refuel, then divide the miles driven by the gallons it took to fill back up. Example: 300 miles ÷ 10 gallons = 30 MPG.
What is a good MPG for a car?
For a sedan, 30+ is good and 40+ is excellent. SUVs at 25–28 are solid, trucks at 20–24 are typical, and hybrids often reach 45–55 MPG.
Why is my actual MPG lower than the sticker rating?
EPA sticker numbers come from lab tests. Real driving — city traffic, cold weather, short trips, hard acceleration, low tire pressure, AC use — usually makes real MPG 10–20% lower. That's normal.