What is the exact conversion factor from km/L to MPG?

1 km/L = 2.35215 MPG (US). This comes from 1 mile = 1.60934 km and 1 US gallon = 3.78541 L, giving 3.78541 / 1.60934 ≈ 2.35215.

Is this US gallons or UK (Imperial) gallons?

This tool uses US gallons (3.78541 L). UK Imperial MPG uses a larger gallon (4.54609 L), so 1 km/L ≈ 2.82481 UK MPG — a different conversion. Always check which standard a vehicle spec uses.

How do I convert MPG back to km/L?

Divide the MPG value by 2.35215. For example, 30 MPG ÷ 2.35215 ≈ 12.75 km/L. You can also use the Swap button in this tool to flip the direction.

What is a good fuel economy in km/L?

A typical efficient passenger car gets 15–20 km/L (35–47 MPG US). Hybrids often exceed 20 km/L. Heavy trucks and SUVs usually fall below 10 km/L (under 24 MPG US).

Why do some countries use L/100km instead of km/L?

L/100km is common in Europe, Australia, and Canada. It expresses consumption (lower = better), while km/L expresses efficiency (higher = better). To convert km/L to L/100km, compute 100 ÷ km/L.

km/L to MPG (US) Converter

Name: km/L to MPG (US) Converter
Availability: InStock
Author: Nham Vu

Enter a fuel economy value in km/L and instantly get the equivalent in US MPG (1 km/L = 2.35215 MPG US).

Fuel Economy Converter

Kilometers Per Liter (km/L)

km/L

Miles Per Gallon — US (MPG)

MPG

Result

Enter a value to see the result

1 km/L = 2.35215 MPG (US) | 1 MPG US ≈ 0.425144 km/L

Common Conversions

km/L	MPG (US)	Typical Vehicle

Summary

Enter a fuel economy value in km/L and instantly get the equivalent in US MPG (1 km/L = 2.35215 MPG US).

How it works

Enter your fuel economy value in the km/L or MPG field.
The converter applies the exact factor: 1 km/L = 2.35215 MPG (US).
The equivalent value appears instantly in the other field.
Use the Swap button to reverse the conversion direction.
Copy the result with one click for use elsewhere.

Use cases

Convert a vehicle's km/L rating to US MPG for comparison with American cars.
Check if an imported vehicle meets EPA fuel economy standards.
Compare fuel efficiency between metric and US spec sheets.
Convert rental car economy ratings when traveling to the United States.
Quickly estimate fuel costs for a US road trip from a metric fuel economy figure.

Frequently Asked Questions

Last updated: 2026-07-23 · Reviewed by Nham Vu