Gallons to liters converter

How to convert gallons and liters

One U.S. gallon is exactly 3.785411784 liters, so 10 gallons is about 37.85 liters. A quart is a quarter of a gallon, a pint is half a quart and a cup is half a pint.

Horse examples

An adult horse typically drinks about 5 to 10 gallons of water a day, and demand rises in heat, in work and for a mare nursing a foal. A standard five-gallon bucket holds about 19 liters, so a horse that empties two or three buckets a day is within the usual range. When you add a liquid supplement or electrolyte to water, the label may give a dose in milliliters and a trough size in gallons or liters, which is where this converter helps.

U.S. and imperial gallons

A U.S. gallon is smaller than an imperial gallon, which is about 4.546 liters. If you read a British or Commonwealth source, check which gallon it means.

Where these numbers come from

Standard conversion factors based on international definitions (the international foot, avoirdupois pound and U.S. gallon). Horse figures are typical ranges from veterinary and extension guidance, and they vary by horse. See how we calculate and the disclaimer.