21 Liter/Kilometer to Miles/Gallon (UK)
Quick answer
21 Liter/Kilometer (L/km) equals
0.134515 mpg (UK)
To convert 21 Liter/Kilometers to Miles/Gallon (UK)s, multiply by 2.8248105278. Therefore, 21 Liter/Kilometer (L/km) equals 0.134515 Miles/Gallon (UK) (mpg (UK)).
Formula: mpg (UK) = L/km × 2.8248105278. Calculation: 0.134515 mpg (UK). Reverse: L/km = mpg (UK) × 2.8248105278.
Convert Liter/Kilometer (L/km) to Miles/Gallon (UK) (mpg (UK)) online with our free unit converter. Calculated using formula: mpg (UK) = L/km × 2.8248105278. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Liter/Kilometer to Miles/Gallon (UK)
- Step 1 — start with the formula. mpg (UK) = L/km × 2.8248105278
- Step 2 — substitute your figure. Apply the formula to 21 L/km.
- Step 3 — read the result. 21 L/km = 0.134515 mpg (UK)
- Step 4 — check it in reverse. L/km = mpg (UK) × 2.8248105278 returns 21 L/km, which matches the figure you started with.
Fuel Economy Converter
11 units available
21 L/km = 0.134515 mpg (UK)
Formula:
mpg (UK) = L/km × 2.8248105278With your value: 21 L/km = 0.13451479 mpg (UK)
Other Liter/Kilometer to Miles/Gallon (UK) conversions
Liter/Kilometer to Miles/Gallon (UK) Conversion Table
| Liter/Kilometer (L/km) | Miles/Gallon (UK) (mpg (UK)) |
|---|---|
| 0.5 | 5.649621 |
| 1 | 2.824811 |
| 2 | 1.412405 |
| 5 | 0.564962 |
| 10 | 0.282481 |
| 15 | 0.188321 |
| 20 | 0.141241 |
| 25 | 0.112992 |
| 50 | 0.056496 |
| 100 | 0.028248 |
| 250 | 0.011299 |
| 500 | 0.00565 |
| 1000 | 0.002825 |
Miles/Gallon (UK) to Liter/Kilometer Conversion Table
| Miles/Gallon (UK) (mpg (UK)) | Liter/Kilometer (L/km) |
|---|---|
| 0.5 | 5.649621 |
| 1 | 2.824811 |
| 2 | 1.412405 |
| 5 | 0.564962 |
| 10 | 0.282481 |
| 15 | 0.188321 |
| 20 | 0.141241 |
| 25 | 0.112992 |
| 50 | 0.056496 |
| 100 | 0.028248 |
| 250 | 0.011299 |
| 500 | 0.00565 |
| 1000 | 0.002825 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Liter/Kilometer (L/km)
Fuel Economy
Composite of a defined volume and a defined length. US and imperial gallons differ, so mpg figures are not interchangeable between them.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
Miles/Gallon (UK) (mpg (UK))
Fuel Economy
Composite of a defined volume and a defined length. US and imperial gallons differ, so mpg figures are not interchangeable between them.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Liter/Kilometer to Miles/Gallon (UK)
This conversion uses an offset formula, so it cannot be described by a single multiplication factor.
Formula: mpg (UK) = L/km × 2.8248105278
Reverse: L/km = mpg (UK) × 2.8248105278
Step-by-Step Example
- Start with your value in Liter/Kilometer. For example: 5 L/km
- Apply mpg (UK) = L/km × 2.8248105278
- The result is: 0.564962 mpg (UK)
Liter/Kilometer and Miles/Gallon (UK) Relationship
This calculation facilitates standardized conversion between recognized units of fuel economy. Unlike simple multiplicative factors, this conversion follows an affine calculation model: mpg (UK) = L/km × 2.8248105278. Understanding the relationship between Liter/Kilometer and Miles/Gallon (UK) is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Liter/Kilometer
The Liter/Kilometer (symbol: L/km) is a recognized unit in the Metric (SI) measurement framework, utilized within fuel economy applications for precision and standardized data representation.
Common uses of Liter/Kilometer: fuel economy calculations, engineering and science, education.
About Miles/Gallon (UK)
The Miles/Gallon (UK) (symbol: mpg (UK)) is a recognized unit in the Standard measurement framework, utilized within fuel economy applications for precision and standardized data representation.
Common uses of Miles/Gallon (UK): fuel economy calculations, engineering and science, education.
Frequently Asked Questions
- What is 21 Liter/Kilometer in Miles/Gallon (UK)?
- 21 Liter/Kilometer equals 0.134515 Miles/Gallon (UK).
- How many Miles/Gallon (UK)s are in 1 Liter/Kilometer?
- There are exactly 2.8248105278 Miles/Gallon (UK)s in 1 Liter/Kilometer.
- What is the formula to convert Liter/Kilometer to Miles/Gallon (UK)?
- The formula to convert Liter/Kilometer to Miles/Gallon (UK) is: mpg (UK) = L/km × 2.8248105278. For example, to convert 10 Liter/Kilometers to Miles/Gallon (UK)s, you would apply the formula to 10.
- What is a Liter/Kilometer?
- The Liter/Kilometer (symbol: L/km) is a recognized unit in the Metric (SI) measurement framework, utilized within fuel economy applications for precision and standardized data representation.
- What is a Miles/Gallon (UK)?
- The Miles/Gallon (UK) (symbol: mpg (UK)) is a recognized unit in the Standard measurement framework, utilized within fuel economy applications for precision and standardized data representation.
- What are the common uses of Liter/Kilometer?
- The Liter/Kilometer is commonly used in fuel economy calculations, engineering and science, education.
Related Fuel Economy Conversions
Cite this page
UnitConvertLab. (2026). 21 Liter/Kilometer to Miles/Gallon (UK). UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/21-liter_per_km-to-mpg_uk