Formula: US Gallon → Milliliter
Use this exact relationship: 1 gal = 3785.4118 ml. UnitNest converts through a standard base unit for the volume category.
Quick example
1 US gallons = 3785.4118 milliliters. Change the input above to convert any value; results update instantly in your browser.
Need the other direction? Convert Milliliter to US Gallon.