Fuel Efficiency Calculator: MPG, L/100km, KM/L
Measure your vehicle’s fuel economy instantly. Supports MPG (US/UK), L/100km, KM/L. Use for road trips, fleet tracking, or comparing cars.
How to Use
- Choose Imperial or Metric
- Enter distance and fuel used
- Get results in all units
Example
250 miles, 12.5 gallons (US)
MPG = 250 ÷ 12.5 = 20 MPG
L/100km = (235.215 ÷ 20) = 11.76 L/100km
Conversion Formulas
- MPG (US) = miles ÷ gallons
- L/100km = 235.215 ÷ MPG
- KM/L = 100 ÷ L/100km
Pro Tips
- Reset odometer before filling up
- Use Trip Cost Calculator next
- Track over multiple fill-ups for accuracy
Common Mistakes
- Mixing US and UK gallons
- Forgetting to reset trip meter
- Using partial tank data
FAQs
MPG vs L/100km? Lower L/100km = better efficiency.
Accurate for hybrids? Yes — enter actual fuel used.
Can I save results? Screenshot or bookmark.
Conclusion
Know your fuel efficiency in seconds. Save money, reduce emissions, and plan smarter with our free MPG calculator.
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