Fuel Economy Converter
Conversion
Convert with explicit units, definitions and assumptions.
Formula
Convert via L/100 km: 100/(km/L), 235.214583333333/(US mpg), 282.480936331822/(UK mpg)
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- US liquid and imperial gallons are not interchangeable.
Example Calculation
Example inputs
- Value: 6
- From: L/100 km
- To: US mpg
6 L/100 km is about 39.2024 US mpg.
Method references
Frequently asked questions
How do I use this calculator?
Enter value, from, to. The result updates automatically. Use Reset to restore the example values.
What method does it use?
Convert via L/100 km: 100/(km/L), 235.214583333333/(US mpg), 282.480936331822/(UK mpg). US liquid and imperial gallons are not interchangeable.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.