If you weigh 82 Kilograms (180.4 Lbs) do you know how many calories/kilojoules you will need to consume each day to maintain that weight.

How many calories/kilojoules would a 25 year old female ( 1.78 Mts or 5'10" tall) need to eat to weigh 82 Kgs? ( 1 calorie is equal to 4.184 kilojoules)

How many calories/kilojoules would a 25 year old male of the same height need to consume to maintain this weight?

John,

Here is a great Calorie Requirement Calculator. Just enter in your height, weight, age, gender and activity level and the calculator will tell you how many calories is required to maintain your current body weight.

Calorie Requirement Calculator

Thanks for the great link Ian. I've actually actually have a couple of debates with a few friends about calorie consumption and maintaining weight, so this will help me prove my case.

Thanks Ian,
The calculator will come in handy when I am pushed for time. In Australia we use Metric so conversions will have to be made, besides I love the maths, we are a very mathematically inclined family, both my son's are scientists, one of them a PhD in Maths and they were both in the top 0.02% in the state in 4 unit maths, I also excelled in maths so I guess we like to use it.

Hi Ian,
Can you check the calculator against the formula for working out resting metabolic rate? According to the formula I have, written by the CSIRO ( Commonwealth Scientific Industrial Research Organisation) your calculator is wrong, at least one of them is wrong.
Here is the example I used from their published formula. Susan is 30 years old, weighs 70 Kg, she is 170 cms tall.
Her resting metabolic rate will be.

{655.1+(9.56*weight)+(1.85*height)-(4.68*age)} = calories
if you want to add an activity level, say sedentary (little or no exercise-desk job) you multiply the answer by 1.2

Lets compare....{655.1+669.2+314.5- 140.4}= calories
=1498.4 calories * little or no exercise=1798.08 calories.

Using your calculator we have to convert her height to Feet and inches(5'7'') her weight to Lbs (154) and you get 2036 calories a difference of 238 calories, that is significant.
Cheers

Hi JBB, thanks for checking over our calculators - it's nice to know that we can always count on our loyal readers It took me a while to identify that the formula you cited was indeed the Harris Benedict Equation! The Harris Benedict Equation was actually developed in 1919, which isn't as applicable to the 21st century living anymore Nowadays, at least in North America, health care professionals have adopted the EER (Estimated Energy Requirements) to calculate caloric requirements for healthy adults. For more information, refer to Dietary Reference Intakes published by the National Academy of Sciences http://www.nap.edu/catalog.php?record_id=10490 from your local library.

Hi Gloria,
I hope I didn't offend you by checking the calculator but I do like to know how things work.
Thanks very much for your info, I have enjoyed going back over the Harris Benedict website, Dr Manny Noakes BSc, Dip Nut Diet,PhD from CSIRO explained the huristics of this formula to me. Now I better start learning about EER, you really know your stuff--------- eeerr you don't know a "sticky rice recipe"??

Hey John,

Thanks very much for looking over the calculators. We appreciate all members who not only help others by providing answers but ones who are also active and ask good questions. I vaguely remember the Harris Benedict Equation from university but never knew it was outdated. I am also glad Gloria was able to get to the bottom of all of this!

Thank you Ian,
After looking on the internet this morning at the different equations for resting metabolic rates I have come to the conclusion that a lot of people are still using it, it is still quoted a lot.
http://health.howstuffworks.com/calorie3.htm

Just think how clever you have to be to work out equations like these from scratch, I can only shake my head in amazement.....eeerrr you don't happen to have a recipe for "sticky rice" Ian ??

Hi Everyone,
According to research published in New Scientist- weight is an environmental problem too.


Obese people consume 18% more food energy than lean people, researchers have calculated.

"It's just due to being fatter," says Phil Edwards of the London School of Hygiene and Tropical Medicine.

Edwards and his colleague Phil Roberts say that the way to reduce calorie demands is simple – more exercise.

The researchers calculated the hypothetical difference in food consumption between 1 billion obese and 1 billion lean people.

There were two main components: how much food people need to eat simply to keep their bodies ticking over, even if they don't do any exercise; and how much people consume in typical activities of daily living.
Increased energy

They calculated consumption for lean people with a body-mass-index (BMI) of 24.5 and compared it with the consumption for overweight people with a BMI of 29, just short of the definition of obese, which is marked by a BMI of 30 or more.

BMI is measured by squaring a person's height in metres and dividing that figure by their weight in kilograms.

The pair found that lean people consumed a total of 2500 calories per person per day on average, 18% less than the 2960 calories consumed by obese people.

Broken down into "resting" and "active" components, the data showed that obese people consumed 1680 calories per person per day just to tick over, compared with 1550 calories for leaner people.

"Larger people need more energy just to move blood round the body, maintain larger bodies and keep the heart pumping," says Edwards.
Reason to slim

They also need more energy to transport their extra bulk from A to B. So, daily consumption for routine activities, such as 30 minutes of walking and 7 hours in the office, worked out at 1280 calories for per obese person and 950 calories for each lean person.

Edwards says that the results give fatter people an extra reason to lose weight beyond simply being healthier. He points out that in the UK, for example, one quarter of adults are obese – a figure that is predicted to rise to 40% by 2010.

The calculations are only a conservative estimate of the extra burden imposed by obesity, says Edwards, as they don't include the energy consumed growing, processing and distributing the food.

Nor do the calculations take into account the extra likely consumption of meat protein by fatter people. Each kilogram of meat is estimated to require 7 kg of vegetable matter as feed.
Wasted water

Meanwhile, a report released 14 May by the Stockholm International Water Institute bemoans the amount of fresh water squandered when people throw away food.

The institute points out that in the US, as much as 30% of food is wasted, worth $48.3 billion each year.

"That's like leaving the tap running and pouring 40 trillion litres of water into the garbage can – enough water to meet the household needs of 500 million people for a year," says the report, Saving Water: From Field to Fork, jointly launched with the UN's Food and Agriculture Organization and the International Water Management Institute.

The report, which includes a section on waste related to obesity, calls for all countries to halve the amount of food they throw away by 2025.

Journal reference: The Lancet (vol 371, p 1661)

This is very interesting I find!

Cheers

Hi Readers,
Many people are still failing to understand the basis of their problem, which is simply over eating. You only need a certain amount of calories regardless of height or geographical residence, once you supply the body with the energy required for it's daily needs the extra will be stored as fat, forget anything that complicates this explanation, you eat more than you need you get fat, and if you keep on doing it you keep on getting fatter. I have never seen anyone lose weight by exercise alone, but I have seen them lose lots of weight by simply reducing the amount of calories they eat, and it is not hard, animal products are high in energy (calories) while vegetables and fruit are low in energy, so you reduce the amount of high energy foods and pig out on low energy foods.

Cheers

Good advice. I especially like the "pig out on low energy foods". Care to share a few of these low energy foods? Let me start with a few easy ones. Maybe others can add more exciting ones?

- cabbage
- celery
- lettuce

Hi Ian,
I thought by now someone else may have filled in some blanks here. I have just finished "pigging out" on low energy food for my lunch, when your question came to mind.
cucumber
capsicum
tomato
onion
beetroot
bitter melon
broccoli
brussels sprouts
cauliflower
peas
beans
potato
leeks
radish
sweet potato
sweet corn
pineapple
grapes (red)
fresh water melon ( watch the GI=92)
parsnip
turnip
bok choi
pak choi



I cover my salads with a dressing made from garlic,wholegrain mustard,olive oil and balsamic vinegar.


Anyone else like to add a few more low energy foods that we can "pig out",(eat to excess) on???

Cheers

Hey John,

Thanks for adding to the list. Now I have more options for my salad cravings. Surprised me that potatoe nd sweet potato made the list. By the way, what is the "watch the GI=92" beside fresh water melon?

Hi Ian.
This is the way we (Aussies) would write it, it means Glycaemic Index equals 92. It hits the bloodstream very quickly.

Cheers

Hi everyone,

We still have not progressed far from when this post was started, people are still talking the same old language about ideal weights and weight loss, you know protein shakes, magic bullet (supplements), diets that are proven failures and a little exercise. We should not forget the biggest scam of them all Acai Berries.

The biggest factor by far is don't over eat!!

I have a 62 year old man coming to my clinic who walks hard for one hour every morning, he only eats 4 pieces of toast with margarine on it, washes it down with black sugar less tea for breakfast, no smoko or between meal snacks, lunch is salad with a small portion of cheese or 1 banana,1 apple,1 mandarin and nothing else before tea(dinner).
For dinner he eats 3 sausages or 1 pork chop or 3 small lamb chops or 3 slices of baked lamb or 1 fillet of Atlantic Salmon, he washes this down with 3 glasses of red wine. Now this guy does a days work in an office and has not lost 1 kilo (2.2lbs) in over a year, he never eats take-away of any description, never goes to restaurants or pubs.

He weighs 69 kgs (152 lbs) is 5'6'' tall, so this gives him a body mass index of 24.4 which means he is getting towards the dangerous end of the scale, in my opinion he has already passed it when he passed 22 BMI. By looking at him you can see a bulge around the umbilical so he is definitely fat.

He tried going to the Gym and lifting weights for a couple of hours but it did not do anything. I have suggested that he only has 2 options move more or eat less. He is not interested in being conned by some smooth talker with a diet or supplements, what is your advice?

Cheers

Thanks for this calorie calculator.....

Hello friend
First thanks
All tips are very nice.I want say everyone has told good about calories.Thanks for sharing.

Really a educative and informative post, the post is good in all regards,I am glad to read this post.

Thank you Markeee for the appreciative comments, I am sure the other contributers feel the same way.

Welcome to the forum.

Cheers

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Cheers