Smart averages 68.4 mpg combined across 2 models (2008–2019). The best on record does 108 mpg, the thirstiest 35 — a yearly fuel gap of about $741.
What that actually costs
What a Smart costs to feed, at 12,000 miles a year and $3.20 a gallon.
| Measure | Value |
|---|---|
| Average combined | 68.4 mpg |
| Fuel per year | $561 |
| Most frugal on record | 108 mpg — $356 a year |
| Thirstiest on record | 35 mpg — $1,097 a year |
Smart models by fuel economy
From the most frugal down. The yearly figure is what the fuel actually costs at 12,000 miles.
| Model | Average mpg | Best / Worst engine | Fuel per year |
|---|---|---|---|
| Smart EQ Fortwo | 108 / 102 | $366 | |
| Smart Fortwo | 108 / 35 | $599 |
MPG is a number. Dollars per year is the answer.
- Fuel profile built from your actual mileage and local prices
- Fuel tracker: what you really spend, month by month
- Insurance and fuel folded into 5-year cost to own
- Compare any two cars on total cost, not sticker price
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How we count
Fuel-economy figures come from EPA fueleconomy.gov — the same laboratory numbers printed on the window sticker. We don't adjust them; real-world consumption depends on how and where you drive.
What we add is money. Yearly cost assumes 12,000 miles at $3.20 a gallon — change either and the ranking stays, only the size of the bill moves. Cost per mile is the same figure divided out, useful when comparing a commute against a weekend car.
Frequently asked questions
What is the average Smart mpg?
68.4 mpg combined across 2 models rated between 2008 and 2019. That averages everything the brand has offered, so a long history of trucks pulls it down.
Which Smart model is the most economical?
See the table above — models are sorted from the most frugal down, with what each costs in fuel per year.
How much does a Smart cost to run?
About $561 a year in fuel on average, at 12,000 miles and $3.20 a gallon.
Why does the average look low for a modern brand?
Because it covers every model year on record, back to the 1980s. Cars built before the mid-2000s were markedly thirstier — that era is included.