Kilojoules

Gabby
By GabbyPA Latest Reply 2008-07-18 03:57:33 -0500
Started 2008-07-17 12:38:34 -0500

What are "Kilojoules"? What I gather is that it is related to weight, but I have not found an explination that I can understand. Anyone out there have a lay-mans explination? I see it a lot in calorie counting.


5 replies

Gabby
GabbyPA 2008-07-18 03:57:33 -0500 Report

You are right. We should do that. There are so manythings to learn, it could be alot of fun, in a wierd kind of way.

rj
rj 2008-07-17 15:10:53 -0500 Report

You know with discussions like these…We all ought to get together and come up with a Diabetic Trivia Pursuit game…Good job Barry E…I learn something everyday

BarryE
BarryE 2008-07-17 12:43:57 -0500 Report

I hope this helps Gabby.

A calorie is a unit of measure of the energy required to raise the temperature of 1 gram of water by 1°C. A joule is a unit of electrical energy, commonly used in the physical sciences, equal to the work done when a current of one ampere is passed through a resistance of one ohm for one second. Of course we don't use energy to raise the temperature of water or pass current through a resistance, but similar processes maintain our body temperature and perform other bodily functions.

Because calories and joules are so small, when referring to food and energy expenditure it has become common practice to refer to them in multiples of 1,000. The term for 1,000 calories is kilocalories or kcal, and the term for 1,000 joules is kilojoules or kJ.

1 calorie = 4.184 joules

1 kilocalorie (kcal) = 4.184 kilojoules (kJ)

In the scientific and educational communities, it is also common practice to refer to kilocalories as Calories (with an uppercase "c"). However, outside these communities, it has become common practice to simply refer to kilocalories as calories. Therefore when you read 500 calories on a food label it actually means 500 kilocalories, and the same holds true when you calculate an activity that burns 500 calories.

Gabby
GabbyPA 2008-07-17 15:11:00 -0500 Report

I am not a very good techno geek...it is like bites, kilobites and megabites...all measurements reduced to a number that is easier to grasp?? Why do these thing have to be so complicated? I think I get it, but why not just choose one way to call it in the world we live in? Keep the scientific jargan for the sciencetists?