what is a kcal???

[blown93302]

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is there a difference between a kcal and a calorie? may be a dumb question, but i see kcal all the time. thanks

 

[BigAndy69]

Nope.

 

[fiatconspiracy]

it is a science term, a kcal is equal to a common terminology calorie, but in science a kcal is really a 1000 smaller units of calorie, it is confusing, but even scientists use the term calorie to mean kcal

 

[blood_drinker]

Yeah even though I've been told they are the same it does sound confusing, as kilo=thousand. So kcal literally would be 1000 cals correct? But when you see in cereal boxes, for 30g you get 300kcal. Obviously, that erases the doubt,....but still it's confusing.

 

[dngu047]

If you want to be downright anal about things a calorie is a measure of heat...it's the quantity of heat required to raise 1 gram of water by 1 degree celcius at 1 atmosphere pressure

Now most people including myself just can't be bothered using the strict scientific definition so when people say that a meal has 500 calories (or that they burnt 500 calories during an hour of cardio) they really mean 500 000 calories or 500 kilocalories...

 

[blood_drinker]

and what's a KJ , a kilo joules or something?
I see that in cereal boxes here in paris

 

[Par Deus]

and what's a KJ , a kilo joules or something?
I see that in cereal boxes here in paris

Yes. It is also widely used in the literature. There are 4-5 KJ per kcal.

 

[dngu047]

Getting anal again 1 joule is the amount of work done when a force of one newton acts through a distance of one metre...

since there are 4.2 joules in a calorie
then 4.2 kilojoules = 1 kcal

 

[Snooker991]

It is not Anal dude...

Bump for dngu047...
Good info, and sometimes it is even relevant

Later,
Snooker

 

[fiatconspiracy]

and to be even more anal, it is raising the degree celsios from 14.5 to 15.5 degress, because the energy changes in a non liner