How to Convert gal/100mi to mpg (us)
To convert gal/100mi to mpg (us), divide the value by -0.425144.
The Formula
mpg (us) = gal/100mi ÷ -0.425144
Key Fact
1 miles per gallon (us) = -0.425144 gal/100mi
Tip: To convert mpg (us) back to gal/100mi, multiply by -0.425144.