Everything we consume contains energy our bodies use to move, grow and maintain health. To work out how much energy is in different foods and drinks, we need to first look at a few core concepts.

The math it took to calculate the number of calories in your favorite snack involved a lot more guesstimation than you may think. Subscribe to read this story ad-free Get unlimited access to ad-free ...

Did you know that a calorie label only has to be accurate within twenty percent? It’s a wide margin, but it exists for a reason: calories are complicated. Did you know that a calorie label only has to ...

What is a calorie? While most people think of calories in relation to food, calories are simply a unit of heat energy. In fact, measuring calories is essential to energy science because every chemical ...