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This article gives an overview of calories various aspects involved in their calculation.

Definition of Calorie

In general, a calorie is defined as the amount of heat required to raise the temperature of one gram of water by one degree Celsius.

Understanding Weight Gain, Calories and Nutrients

Weight gain is caused when there is an excessive calorie intake and not burning them enough. When the calories are not burnt, they slowly form into fat and accumulate in some parts of our body.

Here the quality of the calories also plays an important role in maintaining health.

Depending on their nutritional values, calories are categorized as follows:

Remember, when your body is hungry, it needs nutrients — not calories.


In general, Mifflin-St Jeor Equation calculates basal metabolic rate (BMR). This calorie meter works on this equation, and the results are given by considering all the average values. BMR is the amount of energy expended per day at rest.

Have you checked our Basal Metabolic Rate (BMR) Calculator?

There exist other equations including the Harris-Benedict Equation which was used until 1990 before the introduction of the Mifflin-St Jeor Equation and the Katch-McArdle Formula which calculates resting daily energy expenditure (RDEE) by taking lean body mass into account.

New to Lean Body Mass? Our Lean Body Mass Calculator (LBM) will help you.

The Mifflin-St Jeor Equation gives the most accurate equation for calculating BMR, with the exception that the Katch-McArdle Formula can be more accurate for people who are leaner that know their body fat percentage. The Mifflin-St Jeor Equation is as follows:

For an adult (men):
BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age(y) + 5
For an adult (women):
BMR = 10 × weight(kg) + 6.25 × height(cm) - 5 × age(y) - 161

Why should you know about calories?

Use our calorie calculator and stay healthy!

How to use Calculator Hut’s Calorie calculator?

The Calorie Calculator tells the number of calories a person needs to consume each day. This helps the person for gaining or losing weight.

All you need is to enter your age, gender, height, and weight and click on calculate to get the results. You will get the number of calories you have intake a day. This will help you to stay healthy.

Try our Ideal Weight Calculator here.

Excuses don’t burn calories.

Disclaimer: Understand that Calorie intake varies from person to person and with your genes and lifestyle. This online Calorie calculator is never meant to be a substitute for a professional medical care provider’s advice. If you are suffering from serious health concerns or want to know exactly how many calories you need for a healthy life style, please consult a doctor in person. This online calculator is very generic and for educational purposes only.

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