How many calories do you burn if you drink a cold bottle of water?

Answer 1

First it is important to note the difference between a calorie and a Calorie. By definition a calorie is the amount of heat required to raise the temperature of one gram of water by one degree Celsius at one atmosphere pressure. What we commonly call a Calorie (with a big C) is actually a kilocalorie, or 1000 little calories.

Since body temperature is 37.5 degrees Celsius and there are apx 997 grams of water in a liter, we burn about 37,000 calories (37 Calories) for every liter of almost freezing ice water we drink.

If we drink the recommended 8 cups/2 liters of water per day, 74 calories isn't much when compared to a 2000 Calorie a day diet, but over a year that adds up to around 27,000 Calories burned!

Answer 2

None, but...Water itself contains no calories so if you drink water at body temperature, you will neither gain nor lose calories. However, if you drink cold water, your body will burn a small number of calories warming up the water. But how many?First it is important to note the difference between a calorie and a Calorie. By definition a calorie is the amount of heat required to raise the temperature of one gram of water by one degree Celsius at one atmosphere pressure. What we commonly call a Calorie (with a big C) is actually a kilocalorie, or 1000 little calories.

Since body temperature is 37.5 degrees Celsius and there are apx 997 grams of water in a liter, we burn about 37,000 calories (37 Calories) for every liter of almost freezing ice water we drink.

If we drink the recommended 8 cups/2 liters of water per day, 74 calories isn't much when compared to a 2000 Calorie a day diet, but over a year that adds up to around 27,000 Calories burned just by drinking your water ice cold instead of warm!

Answer 3

The calories are burned not in the drinking, but in your body warming up the water to normal body temperature.

It takes about 30 calories to raise the the temperate of a 1-liter bottle of water from 44 degree to 98.6. So drinking a liter of cold water will require your body to burn at least 30 calories to warm the water up. It is also likely that the metabolic processes for warming the water are not 100% efficient, so the actual number could be significantly higher, so maybe 60 calories would be more accurate.

I have heard even higher estimates, but I've not seen any scientific support for those numbers. In any event, drinking cold water versus warm water would burn a minimum of 30 calories extra per liter.