The daily calorie intake calculator will give you an estimate of required calories to maintain your current weight. To lose weight, you will need to create a calorie deficit either by reduced calorie intake or increased activity, or both.
A calorie is another term for energy. Energy balance is the balance of calories consumed in comparison to calories burned. Food and drink consumed is energy in. Calories that are burned from physical activity is energy out. A certain amount of calories is burned just by digesting food and breathing air. A certain amount of calories is also burned from daily activities.
An essential part of energy balance maintenance will be the amount of energy out. Those who are more active burn more calories compared to those who aren’t as active.
The daily calorie intake calculator figures out daily calories required by multiplying your Basal Metabolic Rate, or BMR, by an activity factor. BMR is the total of energy burned up when resting and is worked out using the Harris Benedict equation.
The Harris Benedict equation is derived from a 1919 study by Francis Gano Benedict and James Arthur Harris. It makes use of the variables of weight, height, age and gender to determine basal metabolic rate. The Harris Benedict equation considers an average body composition having an average muscle to fat mass ratio. This means it can be inaccurate for very muscular or very fat people.
Harris Benedict equation:
For men, Basal Metabolic Rate = 66.4730 + (13.7516 weight in kilograms) + (5.0033 x height in centimetres) – (6.7550 x age in yrs)
For women, Basal Metabolic Rate = 655.0955 + (9.5634 x weight in kilograms) + (1.8496 x height in centimetres) – (4.6756 age in yrs)