Fuel Efficiency Calculator
Calculate your vehicle's fuel efficiency in MPG, KM/L, and cost per distance traveled.
Trip Details
Results
MPG
30.00
KM/L
12.75
Cost per Mile
$0.12
Cost per 100km
$103.88
Fuel Efficiency Tips
Regular maintenance, proper tire pressure, and smooth acceleration can significantly improve your fuel efficiency and save money.
Quick Facts
Average cars get 25-30 MPG on highways and 15-25 MPG in cities. Hybrid vehicles can achieve 40-55 MPG.
Note
Cost calculations use an average gas price of $3.50/gallon. Actual costs vary by region and fuel prices change regularly.
How this fuel efficiency calculator works
This calculator converts fuel efficiency between different units (MPG and KM/L) and estimates your fuel costs based on distance traveled.
- MPG = Distance (miles) / Fuel Used (gallons)
- KM/L = Distance (km) / Fuel Used (liters)
- Cost per Mile = Average Gas Price / MPG
- Cost per 100km uses converted MPG and average gas price per gallon
Last updated: February 2026
Fuel efficiency FAQ
Why does my actual MPG differ from EPA estimates?
Driving habits, traffic conditions, terrain, weather, and vehicle loads all affect fuel efficiency. Highway driving is typically more efficient than city driving.
How can I improve my fuel efficiency?
Maintain proper tire pressure, change air filters regularly, reduce weight, accelerate smoothly, and avoid excessive idling. Proper maintenance is key.
Is premium gas more efficient?
Premium fuel provides better performance in high-compression engines, but won't improve efficiency in regular engines. Use the fuel grade your manufacturer recommends.
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Fuel Efficiency Guide
Learn how to optimize your vehicle's performance and reduce fuel consumption.
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