They're actually the same thing as far as this is concerned.

A "Calorie" and "Kilocalorie" is the same when talking about nutrition and exercise. Your watch says you burned 3000 Calories in the day and your dinner was 373 Calories. What food companies choose to put on food packaging is regional and usually dictated by the government. In the United States, they show everything as "Calorie" but other countries may choose the other. Fitness trackers aren't bound by the same laws, so they may just use "Calorie" because it's easier.

Technically, the calorie the amount of heat energy needed to raise the temperature of 1 gram of water by 1 degree Celsius. This is also referred to as the "gram calorie" or "small calorie". It's still used in chemistry and other science fields.

A Kilocalorie the amount of heat energy needed to raise the temperature of 1 kilogram of water by 1 degree Celsius. This is referred to as the "Big Calorie".

The big Calorie is used in nutrition because the amount of small calories is actually in the thousands. So rather than saying something is "100,000 cals" you just say "100 Cals". Likewise, because the amount of calories people burn is in relation to food, so you'd use the big Calorie.

They're actually the same thing as far as this is concerned.

A "Calorie" and "Kilocalorie" is the same when talking about nutrition and exercise. Your watch says you burned 3000 Calories in the day and your dinner was 373 Calories. What food companies choose to put on food packaging is regional and usually dictated by the government. In the United States, they show everything as "Calorie" but other countries may choose the other. Fitness trackers aren't bound by the same laws, so they may just use "Calorie" because it's easier.

Technically, the calorie the amount of heat energy needed to raise the temperature of 1 gram of water by 1 degree Celsius. This is also referred to as the "gram calorie" or "small calorie". It's still used in chemistry and other science fields.

A Kilocalorie the amount of heat energy needed to raise the temperature of 1 kilogram of water by 1 degree Celsius. This is referred to as the "Big Calorie".

The big Calorie is used in nutrition because the amount of small calories food contains is actually in the thousands. So rather than saying something is "100,000 cals" you just say "100 Cals". Likewise, because the amount of calories people burn is in relation to food, so you'd use the big Calorie.

They're actually the same thing as far as this is concerned.

TLDR section: A "Calorie" and "Kilocalorie" is the same when talking about nutrition and exercise. Your watch says you burned 3000 Calories in the day and your dinner was 373 Calories. What food companies choose to put on food packaging is regional and usually dictated by the government. In the United States, they show everything as "Calorie" but other countries may choose the other. Fitness trackers aren't bound by the same laws, so they may just use "Calorie" because it's easier.

Technically, the calorie the amount of heat energy needed to raise the temperature of 1 gram of water by 1 degree Celsius. This is also referred to as the "gram calorie" or "small calorie". It's still used in chemistry and other science fields.

A Kilocalorie the amount of heat energy needed to raise the temperature of 1 kilogram of water by 1 degree Celsius. This is referred to as the "Big Calorie".

The big Calorie is used in nutrition because the amount of small calories is actually in the thousands. So rather than saying something is "100,000 cals" you just say "100 Cals". Likewise, because the amount of calories people burn is in relation to food, so you'd use the big Calorie.

They're actually the same thing as far as this is concerned.

A "Calorie" and "Kilocalorie" is the same when talking about nutrition and exercise. Your watch says you burned 3000 Calories in the day and your dinner was 373 Calories. What food companies choose to put on food packaging is regional and usually dictated by the government. In the United States, they show everything as "Calorie" but other countries may choose the other. Fitness trackers aren't bound by the same laws, so they may just use "Calorie" because it's easier.

Technically, the calorie the amount of heat energy needed to raise the temperature of 1 gram of water by 1 degree Celsius. This is also referred to as the "gram calorie" or "small calorie". It's still used in chemistry and other science fields.

A Kilocalorie the amount of heat energy needed to raise the temperature of 1 kilogram of water by 1 degree Celsius. This is referred to as the "Big Calorie".

The big Calorie is used in nutrition because the amount of small calories is actually in the thousands. So rather than saying something is "100,000 cals" you just say "100 Cals". Likewise, because the amount of calories people burn is in relation to food, so you'd use the big Calorie.