How many kilometers per liter is 21 miles per gallon?
I US Gallon = 3.7854118 litersSo 21 miles per gallon = 21 per 3.7854118 liters1 mile = 1.609344 kilometersSo, 21 miles = 33.796224 kilometers33.796224 kilometers per 3.7854118 liters = 8.928017818299187 kilometers per liter.... call it 8.93------------1 Imperial Gallon = 4.54609 litersSo, 21 miles per gallon = 21 miles per 4.54609 liters21 miles = 33.796224 kilometersSo 1 mile = 1.609344 kilometersSo, 33.796224 kilometers per 4.54609 = 7.43413008862759 kilometers per liter.... call it 7.43