120 Gallon (UK)/100mi to Miles/Gallon (US)
Quick answer
120 Gallon (UK)/100mi (gal (UK)/100mi) equals
5.53697 mpg
To convert 120 Gallon (UK)/100mis to Miles/Gallon (US)s, multiply by 664.4363579866. Therefore, 120 Gallon (UK)/100mi (gal (UK)/100mi) equals 5.53697 Miles/Gallon (US) (mpg).
Formula: mpg = gal (UK)/100mi × 664.4363579866. Calculation: 5.53697 mpg. Reverse: gal (UK)/100mi = mpg × 664.4363579866.
Convert Gallon (UK)/100mi (gal (UK)/100mi) to Miles/Gallon (US) (mpg) online with our free unit converter. Calculated using formula: mpg = gal (UK)/100mi × 664.4363579866. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Gallon (UK)/100mi to Miles/Gallon (US)
- Step 1 — start with the formula. mpg = gal (UK)/100mi × 664.4363579866
- Step 2 — substitute your figure. Apply the formula to 120 gal (UK)/100mi.
- Step 3 — read the result. 120 gal (UK)/100mi = 5.53697 mpg
- Step 4 — check it in reverse. gal (UK)/100mi = mpg × 664.4363579866 returns 120 gal (UK)/100mi, which matches the figure you started with.
Fuel Economy Converter
11 units available
120 gal (UK)/100mi = 5.53697 mpg
Formula:
mpg = gal (UK)/100mi × 664.4363579866With your value: 120 gal (UK)/100mi = 5.53696965 mpg
Other Gallon (UK)/100mi to Miles/Gallon (US) conversions
Gallon (UK)/100mi to Miles/Gallon (US) Conversion Table
| Gallon (UK)/100mi (gal (UK)/100mi) | Miles/Gallon (US) (mpg) |
|---|---|
| 0.5 | 1,328.872716 |
| 1 | 664.436358 |
| 2 | 332.218179 |
| 5 | 132.887272 |
| 10 | 66.443636 |
| 15 | 44.295757 |
| 20 | 33.221818 |
| 25 | 26.577454 |
| 50 | 13.288727 |
| 100 | 6.644364 |
| 250 | 2.657745 |
| 500 | 1.328873 |
| 1000 | 0.664436 |
Miles/Gallon (US) to Gallon (UK)/100mi Conversion Table
| Miles/Gallon (US) (mpg) | Gallon (UK)/100mi (gal (UK)/100mi) |
|---|---|
| 0.5 | 1,328.872716 |
| 1 | 664.436358 |
| 2 | 332.218179 |
| 5 | 132.887272 |
| 10 | 66.443636 |
| 15 | 44.295757 |
| 20 | 33.221818 |
| 25 | 26.577454 |
| 50 | 13.288727 |
| 100 | 6.644364 |
| 250 | 2.657745 |
| 500 | 1.328873 |
| 1000 | 0.664436 |
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.
Gallon (UK)/100mi (gal (UK)/100mi)
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 (US) (mpg)
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 Gallon (UK)/100mi to Miles/Gallon (US)
This conversion uses an offset formula, so it cannot be described by a single multiplication factor.
Formula: mpg = gal (UK)/100mi × 664.4363579866
Reverse: gal (UK)/100mi = mpg × 664.4363579866
Step-by-Step Example
- Start with your value in Gallon (UK)/100mi. For example: 5 gal (UK)/100mi
- Apply mpg = gal (UK)/100mi × 664.4363579866
- The result is: 132.887272 mpg
Gallon (UK)/100mi and Miles/Gallon (US) Relationship
This calculation facilitates standardized conversion between recognized units of fuel economy. Unlike simple multiplicative factors, this conversion follows an affine calculation model: mpg = gal (UK)/100mi × 664.4363579866. Understanding the relationship between Gallon (UK)/100mi and Miles/Gallon (US) is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Gallon (UK)/100mi
The Gallon (UK)/100mi (symbol: gal (UK)/100mi) is a recognized unit in the US Customary / Imperial measurement framework, utilized within fuel economy applications for precision and standardized data representation.
Common uses of Gallon (UK)/100mi: fuel economy calculations, engineering and science, education.
About Miles/Gallon (US)
Miles per gallon (mpg) is the standard measure of fuel economy in the United States.
Common uses of Miles/Gallon (US): car window stickers, fuel costs, environmental metrics.
Frequently Asked Questions
- What is 120 Gallon (UK)/100mi in Miles/Gallon (US)?
- 120 Gallon (UK)/100mi equals 5.53697 Miles/Gallon (US).
- How many Miles/Gallon (US)s are in 1 Gallon (UK)/100mi?
- There are exactly 664.4363579866 Miles/Gallon (US)s in 1 Gallon (UK)/100mi.
- What is the formula to convert Gallon (UK)/100mi to Miles/Gallon (US)?
- The formula to convert Gallon (UK)/100mi to Miles/Gallon (US) is: mpg = gal (UK)/100mi × 664.4363579866. For example, to convert 10 Gallon (UK)/100mis to Miles/Gallon (US)s, you would apply the formula to 10.
- What is a Gallon (UK)/100mi?
- The Gallon (UK)/100mi (symbol: gal (UK)/100mi) is a recognized unit in the US Customary / Imperial measurement framework, utilized within fuel economy applications for precision and standardized data representation.
- What is a Miles/Gallon (US)?
- Miles per gallon (mpg) is the standard measure of fuel economy in the United States.
- What are the common uses of Gallon (UK)/100mi?
- The Gallon (UK)/100mi is commonly used in fuel economy calculations, engineering and science, education.
Related Fuel Economy Conversions
Cite this page
UnitConvertLab. (2026). 120 Gallon (UK)/100mi to Miles/Gallon (US). UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/120-gallon_per_100mi_uk-to-mpg_us