Fuel Economy converter
US Gallons per 100 Miles to MPG Converter
Convert US gallons per 100 miles to miles per US gallon for US fuel economy analysis.
From
To
Result
1 gal/100mi = 100 mpg
Also equals
100mpg
2.35215L/100km
42.514295km/L
120.095mpg (UK)
Conversion formula
mpg = 100 ÷ gal/100mi3 gal/100mi equals approximately 33.33 mpg.
US Gallons per 100 Miles to Miles per Gallon (US) table
| US Gallons per 100 Miles (gal/100mi) | Miles per Gallon (US) (mpg) |
|---|---|
| 0.01 | 10,000 |
| 0.1 | 1,000 |
| 1 | 100 |
| 2 | 50 |
| 3 | 33.3333 |
| 5 | 20 |
| 10 | 10 |
| 20 | 5 |
| 50 | 2 |
| 100 | 1 |
| 1,000 | 0.1 |
About this conversion
This converter uses the displayed definition for us gallons per 100 miles and its recognized relationship to miles per gallon (us). Calculations retain full precision internally, and only the visible result is rounded. You can swap the conversion direction without changing the underlying standard.
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Frequently asked questions
How do I convert gal/100mi to MPG?+
Divide 100 by the gallons per 100 miles value.
Why is this inverted?+
Gallons per 100 miles measures fuel per distance, while MPG measures distance per fuel — they are inversely related.
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