? Fuel Economy Calculator
Calculate your vehicle's MPG, fuel costs per mile, and trip expenses. Track and improve your fuel efficiency.
Calculate your vehicle's MPG, fuel costs per mile, and trip expenses. Track and improve your fuel efficiency.
Fuel economy measures how far a vehicle can travel on a given amount of fuel. Understanding your vehicle's efficiency helps you save money and reduce environmental impact.
| Measurement | Used In | Description |
|---|---|---|
| MPG (US) | United States | Miles per US gallon (3.785 L) |
| MPG (UK) | United Kingdom | Miles per Imperial gallon (4.546 L) |
| L/100km | Europe, Canada, Australia | Liters needed per 100 kilometers |
| km/L | Japan, India, some Asia | Kilometers per liter |
US MPG to L/100km: 235.215 × MPG
L/100km to US MPG: 235.215 × L/100km
UK MPG to US MPG: UK MPG × 0.833
Example: 30 US MPG = 7.84 L/100km
Maintain consistent speed and use cruise control on highways. Aggressive acceleration wastes fuel.
Save 10-20%Keep engine tuned, air filters clean, and use recommended oil grade. Proper maintenance improves efficiency.
Save 5-10%Check tire pressure monthly. Under-inflated tires increase rolling resistance and reduce MPG.
Save 3-5%Air conditioning uses extra fuel. At lower speeds, open windows; at highway speeds, use AC (less drag).
Save 5-15%Every 100 lbs reduces fuel economy by about 1%. Remove unnecessary cargo and roof racks.
Save 1-3%Combine trips, avoid rush hour, and use GPS to find the most efficient routes. Less idling = more savings.
Save 5-10%| Vehicle Type | City MPG | Highway MPG | Combined |
|---|---|---|---|
| Compact Car | 28-32 | 35-42 | 30-35 |
| Midsize Sedan | 24-28 | 32-38 | 27-32 |
| SUV | 18-24 | 24-30 | 20-26 |
| Pickup Truck | 15-20 | 20-25 | 17-22 |
| Hybrid | 45-55 | 40-50 | 45-52 |
| Electric (MPGe) | 100-130 | 90-110 | 100-120 |
The US EPA tests and publishes official fuel economy figures for all new vehicles. These are the 2025×2026 model year averages by vehicle category, along with annual fuel cost estimates at the national average gas price of $3.25/gallon:
| Vehicle Type | City MPG (avg) | Highway MPG (avg) | Est. Annual Fuel Cost |
|---|---|---|---|
| Compact car (non-hybrid) | 28×32 | 35×42 | $1,300×$1,600 |
| Compact hybrid (Toyota Camry Hybrid) | 44×52 | 47×53 | $850×$1,000 |
| Midsize SUV (non-hybrid) | 20×24 | 27×32 | $1,900×$2,400 |
| Full-size pickup truck (4WD) | 14×18 | 18×22 | $2,800×$3,500 |
| Electric vehicle (EV) × full BEV | equivalent 90×130 MPGe | equivalent 85×120 MPGe | $450×$700 (electricity) |
| Minivan | 19×22 | 25×29 | $2,000×$2,500 |
Track real-world fuel economy and per-mile cost from your fill-ups.
Driving 300 miles between fill-ups, using 12 gallons of fuel.
Result: Fuel economy = 300 ÷ 12 = 25 mpg.
The same 25 mpg car with gas at $3.60 per gallon.
Result: Cost per mile = 3.60 ÷ 25 = 14.4¢/mile (≈ $0.144).
Driving 12,000 miles a year at 25 mpg and $3.60/gallon.
Result: 480 gallons × $3.60 = $1,728/year.
Fill the tank, reset the trip meter, drive normally, then at the next fill-up divide miles driven by gallons added. Repeat over several tanks for an accurate average.
Modern compact cars average 30–40 mpg, SUVs 20–28 mpg, and hybrids 45–55 mpg. Higher is cheaper to run; compare similar vehicle classes.
Drive smoothly, keep tires properly inflated, remove excess weight, avoid idling, and maintain the engine. Gentle acceleration alone can improve economy 10–20%.
Cost-per-mile reflects today's fuel price and lets you compare vehicles on different fuels (including EVs), so it's often the more practical number.
Quick unit conversions related to this calculator: