Direct conversion
Convert gallon (US) per 100 miles [gal/100 mi US] to kilometer per liter [km/L] instantly with formula, examples, chart, and FAQs.
Quick answer
Use the calculator below for any custom value, then check the formula, examples, chart, and reverse conversion links.
Fuel economy uses reciprocal conversion: 1 gallon (US) per 100 miles [gal/100 mi US] = 42.514371 kilometer per liter [km/L]. Enter any value for the exact reciprocal result.
Fuel economy uses reciprocal conversion: 1 gallon (US) per 100 miles [gal/100 mi US] = 42.514371 kilometer per liter [km/L]. Enter any value for the exact reciprocal result.
Example: 1 gallon (US) per 100 miles [gal/100 mi US] equals 42.514371 kilometer per liter [km/L].
Fuel consumption conversions use liter per 100 kilometers as the reference unit. Economy units such as mpg and km/L use reciprocal formulas.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
The gallon (US) per 100 miles (gal/100 mi US) is a fuel consumption unit used to express measurements in this converter.
HistoryThis unit is included because it appears in practical measurement systems, technical references, product specifications, or everyday conversion needs.
Current useUse gallon (US) per 100 miles when comparing fuel consumption values, checking specifications, converting between systems, or preparing quick estimates.
Kilometers per liter measures how many kilometers a vehicle travels using one liter of fuel.
HistoryThe unit combines metric distance and metric liquid volume for practical fuel economy comparisons.
Current useKilometers per liter is used for cars, motorcycles, trip planning, and fuel cost estimates in many countries.
| gallon (US) per 100 miles [gal/100 mi US] | kilometer per liter [km/L] |
|---|---|
| 1 | 42.514371 |
| 2 | 21.257185 |
| 5 | 8.502874 |
| 10 | 4.251437 |
| 15 | 2.834291 |
| 20 | 2.125719 |
| 25 | 1.700575 |
| 30 | 1.417146 |
| 40 | 1.062859 |
Use this formula: Fuel economy uses reciprocal conversion: 1 gallon (US) per 100 miles [gal/100 mi US] = 42.514371 kilometer per liter [km/L]. Enter any value for the exact reciprocal result. Enter your value in the calculator and the result updates instantly.
1 gallon (US) per 100 miles [gal/100 mi US] equals 42.514371 kilometer per liter [km/L].
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.