Fuel Consumption Converter
Convert any value from kilometer/liter to mile/us gallon with full precision. Use the converter above for instant results, or read on for the exact formula, worked examples, common uses, and answers to frequently asked questions.
📊 Quick Reference Table
About the Kilometer/Liter to Mile/US Gallon conversion
Fuel economy is reported differently around the world. The US uses miles per gallon (MPG), Canada and the UK use a different gallon, and most of the rest of the world uses liters per 100 kilometers (L/100 km) or kilometers per liter (km/L). Converting accurately between these helps compare vehicles and estimate fuel costs across regions.
This page focuses specifically on converting kilometer/liter to mile/us gallon. Use the converter above for instant results, or read on for what each unit is, the exact formula, a worked example, and answers to common questions.
Understanding kilometer/liter and mile/us gallon
What is a kilometer/liter?
Kilometers per liter states how far a vehicle travels on one liter of fuel, so a higher number means better economy. It is a common way to express fuel efficiency in many countries outside North America.
What is a mile/us gallon?
Miles per US gallon states how far a vehicle travels on one US gallon of fuel. It is the standard measure of fuel economy in the United States.
How a kilometer/liter compares to a mile/us gallon
The kilometer/liter is the larger of the two units: one kilometer/liter is about 2.35214584 mile/us gallon. Because the mile/us gallon is smaller, the same length or quantity works out to a larger number when you measure it with that unit. Knowing which unit is larger is a quick way to sanity-check a conversion: if the numbers move in the wrong direction, the two units have probably been swapped.
Conversion formula
The exact mathematical relationship between kilometer/liter and mile/us gallon is:
1 kilometer/liter = 2.35214584 mile/us gallon
So to convert a value V from kilometer/liter to mile/us gallon, use:
Vmile/us gallon = Vkilometer/liter × 2.35214584
To go in the opposite direction:
Vkilometer/liter = Vmile/us gallon × 0.42514371
These factors come from the international definitions published by NIST, BIPM, and ISO 80000 and are exact within their respective standard systems. The converter applies them with full floating-point precision.
Worked example
Using the formula above, here are some common values converted from Kilometer/Liter to Mile/US Gallon:
| Kilometer/Liter | Mile/US Gallon |
|---|---|
| 1 | 2.352146 |
| 5 | 11.760729 |
| 10 | 23.521458 |
| 25 | 58.803646 |
| 50 | 117.607292 |
| 100 | 235.214584 |
Sources and accuracy
The US gallon equals 3.785411784 L and the UK gallon equals 4.54609 L, both exactly defined by international standards. Conversions are linear combinations of length and volume unit conversions.
Conversion factors are cross-checked against the NIST SP 811 guide, the BIPM SI brochure, and ISO 80000, plus published historical references for older unit systems. For mission-critical work such as medical dosing, legal-for-trade measurement, aerospace, or large-scale engineering, always verify independently with the original source.
Practical tips
L/100 km is inversely proportional to km/L and MPG — lower L/100 km means better fuel economy, while higher MPG or km/L means better. To compare US MPG to European L/100 km, divide 235.21 by the MPG value.
Frequently asked questions
How many mile/us gallon are in one kilometer/liter?
One kilometer/liter equals 2.35214584 mile/us gallon. To convert, multiply your kilometer/liter value by 2.35214584.
Which is bigger, a kilometer/liter or a mile/us gallon?
The kilometer/liter is bigger. One kilometer/liter equals about 2.35214584 mile/us gallon.
How accurate is this kilometer/liter to mile/us gallon converter?
It uses the official international conversion factors from NIST and BIPM with full double-precision floating-point accuracy. For everyday use the result is precise to many more decimal places than any practical measurement requires.
Can I convert mile/us gallon back to kilometer/liter as well?
Yes. Use the swap button above to reverse the From and To fields, or change either dropdown to any unit in the fuel consumption category. The calculation runs entirely in your browser, so it also works offline once the page has loaded.
About Fuel Consumption Conversions
Convert between MPG (US & UK), km/L, L/100km, and more.
UnitSwiftPro uses internationally standard conversion factors maintained by NIST and ISO. For critical applications (medical, engineering, legal), always verify against an authoritative source.