Drinking water can help you lose weight, whether you're restricting your calories or not. Consuming 2 cups of water before a meal helped a group of obese adults lose 2 pounds over a 12-week period without making any other changes to their usual intake, according to a 2015 clinical study published in Obesity.
How many tea bags should you use to make a half gallon of iced tea? One gallon is about 128 ounces, so if one tea bag is good for 10 oz  of water, then about 10 teabags is good for a gallon. Start with 10  and adjust accordingly with water.
Thereâ¦ are 128 fl. oz. in a gallon, so there are 16 cups (8 fl. oz. glasses) in one gallon. Take the 578 calories from the gallon of sweetened tea divided by the 16 cups and you get the amount of calories in an 8 oz. glass. Formual broken down: 578 calories per gallon / 16 cups per gallon ~ 36 calories per cup.