Fuel Consumption Converter
Convert between MPG (US & UK), km/L, L/100km, and more. Type a value in any field to see the result instantly.
📊 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 the exact formula, a worked example, and answers to common questions.
Where this conversion is used
Car shoppers compare fuel economy across markets. Logistics companies calculate fleet fuel costs. Drivers estimate fuel needs for trips. Policy analysts compare fuel efficiency standards across countries.
If you frequently convert kilometer/liter to mile/us gallon, bookmark this page — the exact URL gives you instant access without searching, and the conversion widget is ready to use the moment the page loads.
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.
This page was reviewed against multiple authoritative references. Conversion factors are cross-checked with the NIST SP 811 guide, the BIPM SI brochure, ISO 80000, and where applicable, the historical references for older unit systems. If you spot an inconsistency or have a suggested improvement, please let us know via the contact page.
Important disclaimer: for mission-critical work — medical dosing, legal-for-trade measurements, aerospace, large-scale engineering, and financial calculations — always verify independently with the original source. This converter is intended for everyday conversions, education, and quick reference.
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.
If you are converting large lists of values, use the swap button to instantly reverse direction without retyping. For decimal-heavy values you can paste them directly into the From field — the input accepts standard decimal notation, including negative values and scientific notation (for example, 1.23e-5).
Frequently asked questions
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 in both directions?
Yes. Use the ⇄ button above to swap the From and To fields. You can also change either dropdown to any unit in the fuel consumption category.
Do I need an internet connection?
Only for the first page load. Once the converter is loaded it runs entirely in your browser, so it works offline as well.
Is my data private?
Yes. The conversion calculation happens locally in your browser. The values you enter are never sent to any server.
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.