Free Gas Mileage Calculator - Calculate Your MPG
Calculate miles per gallon for your vehicle. Best free gas mileage calculator 2025 - track fuel economy and trip costs.
Quick Answer
MPG (Miles Per Gallon) = Miles driven / Gallons used. If you drove 350 miles on 10 gallons: 350/10 = 35 MPG. Track this each fill-up to monitor fuel economy. Calculate trip fuel costs: distance / MPG × gas price. Calculate at practicalwebtools.com.
Key Facts about Gas Mileage Calculator:
- MPG = Miles driven / Gallons of fuel used
- US average: 24.9 MPG for light vehicles
- City MPG is typically lower than highway MPG
- Factors: speed, driving style, maintenance, weather
- EPA estimates are for ideal conditions
- Tire pressure affects fuel economy by 2-3%
- Every 5 mph over 50 mph costs 7¢+ per gallon
Why Use Our Gas Mileage Calculator?
Track your fuel economy:
MPG Calculation
Calculate miles per gallon.
Trip Cost
Estimate fuel cost for trips.
Economy Tracking
Monitor fuel efficiency.
Convert Units
MPG, L/100km, km/L.
Instant Results
Get MPG immediately.
100% Private
Your data stays private.
How to Gas Mileage Calculator in 3 Easy Steps
Calculate MPG:
Enter Miles
Miles driven since last fill-up.
Enter Gallons
Gallons used to fill tank.
Get MPG
See your fuel economy.
Track Your Fuel Economy
Know your actual MPG
Plan trip fuel costs
Monitor vehicle health
Save money on gas
Common Use Cases for Gas Mileage Calculator
Perfect for:
Frequently Asked Questions
Everything you need to know about our gas mileage calculator
How do I calculate MPG?
Miles driven ÷ gallons used. 280 miles / 8 gal = 35 MPG.
MPG = Miles driven / Gallons used. Fill up, reset trip odometer, drive, fill up again, note gallons. Example: 280 miles / 8 gallons = 35 MPG.
What is good gas mileage?
30+ MPG good for cars, 40+ excellent. SUVs: 20-25, hybrids: 40-60.
30+ MPG is good for a regular car. 40+ is excellent. SUVs average 20-25 MPG. Hybrids get 40-60 MPG. Electric vehicles have MPGe ratings of 100+.
Why is my MPG lower than rated?
Real conditions differ from EPA tests - driving style, weather, maintenance.
EPA ratings are for ideal conditions. City driving, cold weather, aggressive acceleration, high speeds, underinflated tires, and AC use reduce real MPG.
How can I improve my gas mileage?
Smooth driving, proper tire pressure, regular maintenance, reduce weight.
Drive smoothly, maintain speed limits, keep tires inflated, reduce idling, remove excess weight, maintain your vehicle, and avoid short trips when cold.
Still have questions? Try the tool yourself!
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