Quick answer: 15 mpg = 15.68 L/100km ⛽
This page is indexable for this exact conversion query and reuses the full fuel consumption converter for more unit pairs.
International System of Units (SI) measurements
Traditional British and American measurements
15 mpg to L/100km equals 15.68 L/100km (approx).
In L/100km: 15 mpg = 15.68 L/100km.
In kmpl: 15 mpg = 6.38 kmpl.
Formula hint: for mpg to kmpl, multiply mpg by 0.4251.