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# "Energy" vs "Calories"

Having issues here... I can't quite figure out nutruition labels...

How does "energy" convert into calories?

Thank You so Much!

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Convert from what? This should help:

A calorie is a measure of energy.

so they're the same? Energy is another word for Calorie?

yep

Original Post by vivianward:

so they're the same? Energy is another word for Calorie?

Of course not.
Energy is to Calories as Distance is to Feet, or as Age is to Years.
Energy is what you measure and Calorie is (one of) its unit(s) of measure.

In short, Energy is the capacity of a physical system to do work, and you can measure it in Calorie, Joule, and many others.

Yeah calorie is just a measurement of energy.  It takes about 2000 calories on average for a person to function.  That includes all the energy your body needs to keep your heart pumping, digest food, walk, breath, yada yada.

Calorie is to Energy as Liter is to Volume.

A calorie is the equivalent of the amount of heat needed to raise the temperature of 1kg of water by 1 degree celsius.

Calories do seem to hold their own in the going the distance stakes!

Actually, that is a kilocalorie.  A calorie will raise the temperature of 1g of water by 1 degree celcius/Kelvin.

some energy bars nutrition labels say energy:200.

this means 200 calories.

Just to confuse you, steph82much and dcyounts are both right. A calorie will raise the temp of one gram of water one degree, and a Calorie (or one kilocalorie) will raise one kg of water one degree. We should be capitalizing the C, but it is a pain.

So when we talk about calories in food, we  mean  Calories. It's a pity. My great weight loss plan would have been to drink a few pints of ice-cold water, but unfortunately, that only uses up a few Calories. :-)

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