⛽ MPG to L/100 km Converter
Switch between MPG, L/100 km, and km/L to compare vehicles across regions.
Great for car imports, fleet analysis, and travel planning when you need to normalize fuel consumption data.
Enter a positive value. Higher MPG means better efficiency.
30 Miles per Gallon (US) equals
7.84 Liters per 100 km (L/100km)
Other Units
Miles per Gallon (US)
5.42
Miles per Gallon (Imperial)
4.52
Kilometers per Liter (km/L)
12.75
How to Use This Calculator
Enter the fuel economy rating
Use the value reported by the manufacturer, trip computer, or your own calculations.
Choose source and target units
Switch between US MPG, Imperial MPG, liters per 100 km, or kilometers per liter.
Compare at a glance
Review the quick reference grid to see how the same efficiency looks in other systems.
Formula
L/100km = 235.214583 ÷ MPG(US)
L/100km = 282.480936 ÷ MPG(UK)
km/L = 100 ÷ L/100km
Conversions use exact gallon definitions so results align with EPA and EU reporting standards.
Use the formula breakdown to confirm the calculation logic or perform the conversion manually if needed.
Full Description
Fuel economy labels vary worldwide. North America favors miles per gallon, while much of the world uses liters per 100 kilometers. This converter bridges both so you can evaluate vehicles fairly, no matter where their specs originate.
Behind the scenes, all calculations pass through L/100 km—the SI-friendly metric—ensuring precise conversion back to the other units. The Imperial gallon differs from the US gallon, so both are available for accurate UK comparisons.
Keep it handy when importing cars, estimating road trip costs, or tracking fleet performance across borders.
Frequently Asked Questions
Why are there two MPG options?
The US gallon (3.785 L) and Imperial gallon (4.546 L) differ. Selecting the right one keeps conversions precise.
Is a lower L/100 km value better?
Yes. Lower L/100 km means the vehicle uses fewer liters per 100 kilometers, indicating higher efficiency.
Can I enter decimal MPG values?
Absolutely. Fractional MPG numbers improve accuracy for city vs. highway comparisons.
How accurate are the constants?
The calculator uses exact gallon-to-liter and mile-to-kilometer factors, matching official regulatory conversions.