18 Gallon (UK)/100mi to Gallon (US)/100mi
Quick answer
18 Gallon (UK)/100mi (gal (UK)/100mi) equals
14.988135 gal/100mi
To convert 18 Gallon (UK)/100mis to Gallon (US)/100mis, multiply by 0.8326741835. Therefore, 18 Gallon (UK)/100mi (gal (UK)/100mi) equals 14.988135 Gallon (US)/100mi (gal/100mi).
Formula: gal/100mi = gal (UK)/100mi × 0.8326741835. Calculation: 18 × 0.8326741835 = 14.988135 gal/100mi.
Convert Gallon (UK)/100mi (gal (UK)/100mi) to Gallon (US)/100mi (gal/100mi) online with our free unit converter. In fuel economy, 1 gal (UK)/100mi = 0.832674 gal/100mi. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Gallon (UK)/100mi to Gallon (US)/100mi
- Step 1 — start with the formula. gal/100mi = gal (UK)/100mi × 0.8326741835
- Step 2 — substitute your figure. 18 gal (UK)/100mi × 0.8326741835
- Step 3 — read the result. 18 gal (UK)/100mi = 14.988135 gal/100mi
- Step 4 — check it in reverse. gal (UK)/100mi = gal/100mi × 1.2009499271 returns 18 gal (UK)/100mi, which matches the figure you started with.
Fuel Economy Converter
11 units available
18 gal (UK)/100mi = 14.988135 gal/100mi
Formula:
gal/100mi = gal (UK)/100mi × 0.8326741835With your value: 18 gal (UK)/100mi = 14.9881353 gal/100mi
Other Gallon (UK)/100mi to Gallon (US)/100mi conversions
Gallon (UK)/100mi to Gallon (US)/100mi Conversion Table
| Gallon (UK)/100mi (gal (UK)/100mi) | Gallon (US)/100mi (gal/100mi) |
|---|---|
| 0.5 | 0.416337 |
| 1 | 0.832674 |
| 2 | 1.665348 |
| 5 | 4.163371 |
| 10 | 8.326742 |
| 15 | 12.490113 |
| 20 | 16.653484 |
| 25 | 20.816855 |
| 50 | 41.633709 |
| 100 | 83.267418 |
| 250 | 208.168546 |
| 500 | 416.337092 |
| 1000 | 832.674184 |
Gallon (US)/100mi to Gallon (UK)/100mi Conversion Table
| Gallon (US)/100mi (gal/100mi) | Gallon (UK)/100mi (gal (UK)/100mi) |
|---|---|
| 0.5 | 0.600475 |
| 1 | 1.20095 |
| 2 | 2.4019 |
| 5 | 6.00475 |
| 10 | 12.009499 |
| 15 | 18.014249 |
| 20 | 24.018999 |
| 25 | 30.023748 |
| 50 | 60.047496 |
| 100 | 120.094993 |
| 250 | 300.237482 |
| 500 | 600.474964 |
| 1000 | 1,200.949927 |
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
Gallon (US)/100mi (gal/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
How to Convert Gallon (UK)/100mi to Gallon (US)/100mi
To convert from Gallon (UK)/100mi (gal (UK)/100mi) to Gallon (US)/100mi (gal/100mi), multiply the value by 0.8326741835.
Formula: gal/100mi = gal (UK)/100mi × 0.8326741835
Reverse: gal (UK)/100mi = gal/100mi × 1.2009499271
Step-by-Step Example
- Start with your value in Gallon (UK)/100mi. For example: 5 gal (UK)/100mi
- Multiply by the conversion factor: 5 x 0.8326741835
- The result is: 4.163371 gal/100mi
Gallon (UK)/100mi and Gallon (US)/100mi Relationship
Both Gallon (UK)/100mi and Gallon (US)/100mi belong to the US Customary / Imperial system, making this an intra-system conversion within fuel economy. Since 1 Gallon (UK)/100mi represents a fraction of a Gallon (US)/100mi (1 Gallon (US)/100mi ≈ 1.2009 Gallon (UK)/100mis), the Gallon (US)/100mi is the larger measurement interval. Understanding the relationship between Gallon (UK)/100mi and Gallon (US)/100mi 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 Gallon (US)/100mi
The Gallon (US)/100mi (symbol: gal/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 (US)/100mi: fuel economy calculations, engineering and science, education.
Frequently Asked Questions
- What is 18 Gallon (UK)/100mi in Gallon (US)/100mi?
- 18 Gallon (UK)/100mi equals 14.988135 Gallon (US)/100mi.
- How many Gallon (US)/100mis are in 1 Gallon (UK)/100mi?
- There are exactly 0.8326741835 Gallon (US)/100mis in 1 Gallon (UK)/100mi. This means the conversion factor from Gallon (UK)/100mi to Gallon (US)/100mi is 0.8326741835.
- What is the formula to convert Gallon (UK)/100mi to Gallon (US)/100mi?
- The formula to convert Gallon (UK)/100mi to Gallon (US)/100mi is: gal/100mi = gal (UK)/100mi × 0.8326741835. For example, to convert 10 Gallon (UK)/100mis to Gallon (US)/100mis, you would multiply 10 by 0.8326741835.
- 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 Gallon (US)/100mi?
- The Gallon (US)/100mi (symbol: gal/100mi) is a recognized unit in the US Customary / Imperial measurement framework, utilized within fuel economy applications for precision and standardized data representation.
- 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). 18 Gallon (UK)/100mi to Gallon (US)/100mi. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/18-gallon_per_100mi_uk-to-gallon_per_100mi_us