Free Online Calculators
L/100km, km/l, mpg (US/UK)
This converter instantly switches fuel consumption figures between L/100km, km/l, US mpg, and UK mpg. The conversions use fixed factors — for example, 1 US gallon equals 3.785 litres and 1 UK gallon equals 4.546 litres. Great for comparing car specs from different countries at a glance.
1 km/l equals 100 L/100km. The full conversion table for all 5 units is right below the calculator.
| Unit | kmL | L100km | mpgUS | mpgUK | milL |
|---|---|---|---|---|---|
| 1 km/l | 1 | 100 | 2.352144 | 2.824811 | 0.621373 |
| 1 L/100km | 100 | 1 | 235.214421 | 282.481088 | 62.137274 |
| 1 mpg (US) | 0.425144 | 235.214421 | 1 | 1.200951 | 0.264173 |
| 1 mpg (UK) | 0.354006 | 282.481088 | 0.832673 | 1 | 0.21997 |
| 1 Miles/liter | 1.60934 | 62.137274 | 3.7854 | 4.546081 | 1 |
Rounded to six significant digits.
Divide the total amount you spent by the price per unit of fuel to get the volume you bought, then multiply that volume by your vehicle's consumption figure in miles per gallon or miles per litre. The result is the distance the money covers.
Divide the weight in pounds by the fuel's density in pounds per gallon. Jet fuel density changes with temperature and grade, so airlines use the density printed on the fuel ticket rather than a fixed figure.
Multiply the US figure by the ratio between the imperial gallon and the US gallon, since the imperial gallon is the larger of the two. The same car therefore always shows a higher number in imperial MPG.
Litres alone can't become MPG, because one is a volume and the other a fuel economy rating. You need distance as well: convert the litres to gallons and the distance to miles, then divide miles by gallons.
Divide the miles-per-gallon value by the number of litres in the gallon you're using. Note that the answer differs depending on whether the figure is based on US or imperial gallons.
Divide the number of litres by the litres contained in one gallon. Use the US gallon factor for fuel bought in the United States and the imperial factor for the UK.
That depends on which gallon you mean: the imperial gallon used in the UK is noticeably larger than the US liquid gallon, so each has its own litre equivalent. Always check which one a fuel figure refers to before converting.
One gallon of fuel converts to a different number of litres depending on the standard: the US liquid gallon is smaller than the imperial gallon used in the UK. Pick the matching standard before you convert.
A gallon of gas equals its litre equivalent for the standard in use, and the US gallon gives a smaller litre figure than the imperial gallon. To get a price per litre, divide the price per gallon by that same litre equivalent.
Our free fuel consumption converter makes it easy to switch between different fuel efficiency units used around the world. Whether you're comparing a European car rated in liters per 100 kilometers with an American vehicle listed in miles per gallon, or you want to understand fuel economy in kilometers per liter, this tool delivers accurate results in seconds. No formulas, no headaches – just fast, reliable conversions.
Different countries use different standards to express how efficiently a vehicle uses fuel. In Germany, France, and most of Europe, fuel consumption is expressed as L/100 km (liters per 100 kilometers). In the United States, the standard is MPG (US gallons), while the United Kingdom historically used MPG (Imperial gallons). Countries like Japan and India often use km/L (kilometers per liter). These differences can cause real confusion when shopping for cars internationally, reading global automotive reviews, or managing a multinational fleet.
Using our converter couldn't be simpler. Enter the fuel consumption value you already know, select its unit, and all equivalent values in other units are calculated and displayed immediately. There's no submit button to click, no page reload needed – the conversion happens live as you type.
Imagine you're considering buying a used car from the United States, advertised at 35 MPG. Is that good by European standards? Using our converter, you'll find that 35 MPG (US) equals approximately 6.72 L/100 km – reasonably efficient for a non-hybrid vehicle. Now compare it to a European diesel car at 4.5 L/100 km, and you immediately know the diesel is more efficient.
Another common scenario: a Japanese car review mentions fuel efficiency of 20 km/L. Our converter instantly tells you this equals 5 L/100 km or 47 MPG (US) – impressive by any standard.
Businesses that operate vehicle fleets across multiple countries regularly deal with fuel data in different units. Our converter streamlines cost analysis and vehicle procurement decisions by providing instant, accurate unit conversions. Fleet managers can quickly compare fuel efficiency across vehicles from different markets and make data-driven purchasing decisions.
Knowing how to convert fuel consumption figures also helps you estimate real-world running costs. A vehicle consuming 7 L/100 km driving 12,000 miles per year (about 19,300 km) would use approximately 1,351 liters of fuel annually. At $1.50 per liter, that's around $2,026 per year. A more efficient car at 5 L/100 km would cost only $1,448 per year – a significant saving simply by understanding the numbers.
The difference lies in the size of a gallon. A US gallon equals approximately 3.785 liters, while a UK Imperial gallon equals about 4.546 liters. This means a car rated at 40 UK MPG is not as efficient as it might appear when compared to US MPG ratings – 40 UK MPG equals only about 33.3 US MPG.
To convert L/100 km to US MPG, divide 235.214 by the L/100 km value. For example, 8 L/100 km = 235.214 ÷ 8 = 29.4 US MPG. Our converter does this automatically and instantly, eliminating any chance of manual calculation errors.
It depends on the unit. For L/100 km, a lower number is better because it means less fuel used per distance. For MPG and km/L, a higher number is better because it means more distance covered per unit of fuel.
Yes, completely free! Our converter requires no registration, no subscription, and no download. Simply visit the page on simple-calculator.online and start converting immediately.
Absolutely. The fuel consumption converter is fully responsive and works perfectly on smartphones, tablets, and desktop computers. No app installation required.