Web calculator of calories: How many calories to eat per day?

The results of Calorie calculator will show how many calories you should eat in order to maintain basal life processes.

Every person, or his body, requires a certain daily caloric intake. That is called the minimum calorie dose, which depends on body proportions, age, and sex. Of course, there are many other influences affecting the minimum intake of calories, such as stress, type of employment, physical activity or even mental health, but we will not consider these aspects since this is just an indicative calculation.

What are calories?

A calorie is a unit that measures energy. Calories are usually used to measure the energy content of foods and beverages. In order to lose weight, you need to eat fewer calories than your body burns each day. When composing a diet, it's important to keep in mind that the various food components contain different amount of calories. While fats contain the absolute highest calorie/energy ratio, the fiber has the least amount of calories. The table below shows an overview of the basic food ingredients and how many calories they contain per gram.

Food components


Fats 9
Ethanol (in alcohol) 7
Proteins 4
Saccharides 4
Fiber 2

In the following calculator, you can count for yourself the recommended amount of calories you should receive each day, depending on how old you are, whether you are male or female and what your weight or age is. The calculation is for reference only. 100% accurate information about the exact kcal consumption of your body can only be provided by calorimetric examinations in a specialized laboratory. Please enter some basic information about your person and you get a minimum recommended calorie intake in kcal as the result.


Author: Lukáš Beňa


Additional information

Start Free Now

Create your own web calculator in a matter of minutes.
Test all features in the 30-day free trial. 

Sign Up Free

No credit card or installation needed