* Conversion factor: 1 gallon is equal to 3.78541 liters.

* Calculation: Multiply the number of gallons (5) by the conversion factor (3.78541 liters/gallon).

5 gallons * 3.78541 liters/gallon = 18.92705 liters

Therefore, 5 gallons is equal to approximately 18.93 liters.