How much does 1 gallon of powder milk equal in liquids?

One gallon of powdered milk reconstitutes to approximately 10 gallons of liquid milk when mixed with water. Typically, the ratio for reconstitution is about 1 cup of powdered milk mixed with 4 cups of water to create 1 quart of liquid milk. Therefore, when you use 1 gallon of powdered milk, it yields a substantial amount of liquid equivalent, ideal for cooking and baking.