How many calories per kg

How many calories do I need to burn per kilo I want to lose. Right now I am very overweight, obese infact at 80kg and 5'7 as a male and I have terrible strect marks. I just want to know without factoring in food how many calories do I need to burn per kg.

Reply 1

gas_panic!

I think its 3000 or something like that. But i could be wrong.

Reply 2

TomX

This is probably but I'll post anyway:
1 calorie = 4.18400 joules

E = mc^2 = 1 * (3x10^8)^2 = 9*10^16 Joules

9*10^16 / 4.18400 = 2.15 * 10^16 Calories

Wow, that's wrong, I'm *so* failing Physics.

Reply 3

Purple

Check out a diet site such as ediets, it will be more reliable than here. Anyway I think you should give up some food otherwise you will never loose a significant amount of weight quickly.

Reply 4

Tw!stEd

about 5000 kCal

Reply 5

alisama

apparently, one pound of fat will require 3500 calories to put on. so i guess its burn 3500 to take it off. BUT if ur really fat i would assume that the first pounds u lose will go really quickly, because u have to eat lots of food to supply energy to the fat, so if u have lots of fat u have lots of fatcells burning up the calories that u eat just by sitting there.

also, everyone is different with different metabolisms... some people can eat tonnes and sit there and not put any weight on... so, i don't think u should be thinking in calories really. there are just too many factors. just diet and exercise and look at the difference.

Reply 6

M_Jenkins

We need a healthy eating thread. :smile:

That way we can get all advice from one source.

Reply 7

hitmanuk2k

http://www.thestudentroom.co.uk/showthread.php?t=89699 :rolleyes:

Reply 8

fblade

i think its 3500

Reply 9

rock_eleven

i bet if he had asked "how many calories to burn to lose a ton", or "a gram", people would still be replying with 3500.

"calories" "burn" "lose" ---> omg3500!!11

Reply 10

halfoflessthan50p

TomX

This is probably but I'll post anyway:
1 calorie = 4.18400 joules

E = mc^2 = 1 * (3x10^8)^2 = 9*10^16 Joules

9*10^16 / 4.18400 = 2.15 * 10^16 Calories

Wow, that's wrong, I'm *so* failing Physics.

That is the energy required to break 1kg of fat into individual nucleons i think. Like the energy you need to split all the atoms in it.

I know that because i had my last physics exam (ever!) today! (not because im a physics loser you understand :p:

)

Reply 11

rock_eleven

halfoflessthan50p

That is the energy required to break 1kg of fat into individual nucleons i think. Like the energy you need to split all the atoms in it.

if youre going to lose fat, you may as well do it properly :yy:

Reply 12

Derek_The_Hamster

punit

i think its 3500

As I recall it's 3500kcal to the pound, not the kilogram. Hence,

1 kg = 2.2 pounds

=> 1kg = 2.2 * 3500 = ~8000kcal (no calculator to hand, so can't give an exact figure, but just to it yourself if you're curious)

edit: typo

Reply 13

Derek_The_Hamster

halfoflessthan50p

That is the energy required to break 1kg of fat into individual nucleons i think. Like the energy you need to split all the atoms in it.

No, it's the mass-energy equivalence, i.e. the actual amount of energy that that mass is, given mass and energy are the same thing.

Energy from food mass in the body is a chemical process rather than a direct mass<->energy conversion though, hence why this calculation gives an insane answer relatively - if you needed that much energy I'd be scared. Similarly, the energy to break it down into nucleons would be much higher than the chemical energy gained - nearer that than the mass-energy equivalence though by many many orders of magnitude.

edit: correction

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