MPG Calculator — Gas Mileage & Fuel Economy
Calculate your car’s miles per gallon from distance driven and fuel used, or convert between MPG, L/100km, and km/L. All calculations use US gallons (3.785 L).
MPG Reference Table
| MPG (US) | L/100km | km/L | Example Vehicles |
|---|---|---|---|
| 15 | 15.7 | 6.4 | Ford F-250, Chevy Suburban |
| 20 | 11.8 | 8.5 | Ford F-150, Jeep Wrangler |
| 25 | 9.4 | 10.6 | Toyota Camry (city), Honda CR-V |
| 30 | 7.8 | 12.8 | Honda Civic, Mazda3 |
| 35 | 6.7 | 14.9 | Toyota Corolla (hwy), Hyundai Elantra |
| 40 | 5.9 | 17.0 | Toyota RAV4 Hybrid, Honda Accord Hybrid |
| 50 | 4.7 | 21.3 | Toyota Prius, Hyundai Ioniq Hybrid |
| 60 | 3.9 | 25.5 | Toyota Prius Prime (hybrid mode) |
MPG values are approximate combined (city + highway) estimates from fueleconomy.gov. All conversions use US gallons (3.785 L). MPG (UK) values are ~20% higher.
Worked Examples
| Input | MPG (US) | L/100km | km/L |
|---|---|---|---|
| 350 mi ÷ 12 gal | 29.2 | 8.1 | 12.4 |
| 500 km ÷ 40 L | 29.4 | 8.0 | 12.5 |
| 200 mi ÷ 8.5 gal | 23.5 | 10.0 | 10.0 |
| 600 km ÷ 55 L | 25.7 | 9.2 | 10.9 |
What Is Good MPG by Vehicle Type?
| Vehicle Type | Typical MPG Range | Rating |
|---|---|---|
| Compact car | 28–38 MPG | Good to excellent |
| Midsize sedan | 25–35 MPG | Average to good |
| SUV (compact) | 24–32 MPG | Average |
| SUV (full-size) | 18–24 MPG | Below average |
| Pickup truck | 17–25 MPG | Below average |
| Minivan | 22–28 MPG | Average |
| Hybrid | 40–58 MPG | Very good to excellent |
| Plug-in hybrid (PHEV) | 50–130 MPGe | Excellent |
Source: EPA 2024 Automotive Trends Report. Fleet average (all new vehicles): ~28 MPG combined. Sedans/wagons only: ~37 MPG.
Factors That Affect Your Real MPG
Your actual fuel efficiency may differ from EPA estimates:
- City vs highway: City driving uses 15–30% more fuel than highway due to stop-and-go traffic and idling. (Source: DOE/fueleconomy.gov)
- Speed: Above 50 mph, fuel economy drops rapidly — roughly 7% for each 5 mph over 50. At highway speeds of 75 mph, you may use 15–20% more fuel than at 55 mph. (Source: DOE)
- Cold weather: Can reduce MPG by 15–25% for short trips due to denser air, cold engine oil, and longer warm-up. (Source: DOE)
- Tire pressure: Each 1 PSI below recommended pressure reduces MPG by about 0.2%. (Source: DOE)
- Roof cargo: A roof rack or cargo box reduces MPG by 2–25% at highway speeds. (Source: DOE)
- A/C usage: Reduces MPG by up to 25% in stop-and-go; less than 5% on the highway. (Source: DOE)
- Aggressive driving: Rapid acceleration and hard braking costs 15–30% on the highway, 10–40% in the city. (Source: DOE)
Frequently Asked Questions
How do I calculate my car’s MPG?
Fill up the tank, reset the trip meter. Drive normally. At the next fill-up, divide miles driven by gallons pumped. Example: 350 miles ÷ 12 gallons = 29.2 MPG. Or use the Odometer Method tab above.
What is a good MPG?
Average new sedan/wagon: ~37 MPG. Average new vehicle (all types including SUVs and trucks): ~28 MPG (2024 EPA Automotive Trends Report). Over 30 is good for a car, over 40 is excellent. Full-size trucks: 20–25 MPG is typical.
How do I convert MPG to L/100km?
L/100km = 235.215 ÷ MPG. Example: 30 MPG = 235.215 ÷ 30 = 7.84 L/100km.
Why is MPG (US) different from MPG (UK)?
US gallon = 3.785 liters. Imperial gallon = 4.546 liters. So 30 MPG (US) ≈ 36 MPG (UK) for the same car. Our calculator uses US gallons.
Related Calculators
- Gas Trip Cost Calculator — know your MPG? Estimate your trip cost
- Fuel Consumption Calculator — compare vehicles side by side
- Cost per Mile Calculator — convert MPG into per-mile cost
- MPG to L/100km Converter — metric equivalent for European cars
- MPG to km/L Converter — for India, Japan, Brazil markets
- US MPG to UK MPG Converter — UK gallons are larger
- Speed Converter — driving speed strongly affects MPG
- All Fuel Calculators
Calculations use US gallons (3.785 L). MPG conversion: L/100km = 235.215 ÷ MPG (US). km/L = MPG × 0.425144. EPA data from fueleconomy.gov and the 2024 Automotive Trends Report.
