Are you counting calories ?

If you are, you might be wandering exactly how much food and calories you should be eating. If so, the calculator below will give you a rough idea.

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The calculator uses the following formula's:

BMI (Body Mass Index) formula

BMI = weight [kg] /(height [m] x height [m])

Healthy BMI = 18.5 to 24.99
Overweight BMI = 25 to 29.99
Obese BMI = 30 to 34.99
Very obese BMI = >35
Underweight BMI = < 18.5

Formula for calorie requirements for Men & Women

Men 19 years and over

Calorie Requirements = 864 - (9.72 × age [y]) + PA × (14.2 × (22.5 x height [m] x height [m]) + 503 × height [m])[1]

Where PA is the physical activity coefficient:

PA = 1.00 if activity is less than 30 minutes
PA = 1.12 if PAL is 30 to 60 minutes
PA = 1.27 if PAL is 60 minutes or more

Women 19 years and over

Calorie Requirements = 387 - (7.31 × age [y]) + PA × (10.9 × (21.5 x height [m] x height [m]) + 660.7 × height [m])^[1]

Where PA is the physical activity coefficient:

PA = 1.00 if PAL is less than 30 minutes
PA = 1.14 if PAL is 30 to 60 minutes)
PA = 1.27 if PAL is estimated 60 minutes or more

The calculator rounds the calorie requirement to the nearest 100 calories.

[1] Method used to estimate weight maintenance in normal-weight, overweight, and obese adults" in Institute of Medicine (IOM), Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids. Washington DC: National Academies Press, 2002, p. 203-204.

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