Calculate your actual fuel efficiency from your last fill-up. Enter the miles driven and gallons used to find your MPG, cost per mile, and projected annual fuel costs. Compare your vehicle to common benchmarks.
Miles per gallon (MPG) is the standard U.S. measure of vehicle fuel efficiency: how many miles a vehicle travels per gallon of gasoline. Higher is better. A typical compact sedan returns 30–40 MPG in mixed driving; full-size SUVs and pickups return 17–25; hybrids 45–55; and EVs are measured in MPGe (a gasoline equivalent) usually around 100+.
This calculator computes your actual real-world MPG from a single tank's data — miles driven divided by gallons to refill. It also calculates cost per mile and projects annual fuel cost based on a typical 13,500-mile-per-year driving pattern. Real MPG differs from EPA sticker ratings; tracking your own number over a few tanks gives a much more accurate picture of what the vehicle actually costs to operate.
Use this any time you switch vehicles, suspect a maintenance issue (sudden MPG drops can indicate problems with O2 sensors, air filters, or tires), or want to budget fuel costs for a long trip.
350 miles, 12 gallons, gas at $3.50/gal. MPG: 29.2 Cost/mile: $0.12 Annual cost (13,500 mi): ≈ $1,617 This is roughly the EPA average for a non-hybrid car. Improvements: smoother acceleration, proper tire pressure, removing roof racks/cargo when not needed.
An EV at 4 miles per kWh, electricity at $0.15/kWh: Cost per mile: $0.15 / 4 = $0.038/mile The same 13,500 mi/yr costs about $506 — roughly $1,100 less than the 29 MPG gas car.
Use this every few tanks to track real MPG over time, after vehicle maintenance to confirm efficiency restored, when shopping cars (compare your driving pattern's real cost), and when planning long trips.
A few practical notes: - Cold-weather MPG drops 10–25% (winter gasoline blends + idle warm-up + heater) - City driving is typically 30–40% worse than highway for non-hybrids; hybrids close the gap - EPA combined ratings assume 55% city / 45% highway driving; adjust expectations for your pattern - Sudden MPG drop of 15%+ usually indicates a problem (O2 sensor, dirty air filter, low tire pressure, brake drag)
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Your MPG
29.2 mpg
Cost per Mile
$0.12
Annual Fuel Cost
$1,440
Based on 12,000 mi/yr
Monthly Fuel Cost
$120
| Vehicle Type | MPG | Annual Fuel Cost |
|---|---|---|
| Your Vehicle | 29.167 | $1,440.00 |
| Compact Car (35 mpg) | 35 | $1,200.00 |
| Sedan (30 mpg) | 30 | $1,400.00 |
| SUV (25 mpg) | 25 | $1,680.00 |
| Truck (20 mpg) | 20 | $2,100.00 |