This calorie calculator estimates how much energy your body uses at rest (basal metabolic rate) and how much you need per day including everyday activity. It is intended for healthy adults.
How the calculator works
Basal metabolic rate is estimated with the Mifflin-St Jeor equation, which has performed well in studies of healthy adults. It takes weight, height, age and sex into account. Daily needs are obtained by multiplying the basal rate by the physical activity level (PAL). A PAL of 1.4, for example, corresponds to mostly seated work with little leisure activity.
How accurate is the result?
Formulas give average values. Actual needs can differ considerably between individuals, for instance due to muscle mass, hormones or medicines. The result is a guide, not an exact figure.
Who the calculator is not suitable for
Different values apply to children and teenagers, during pregnancy and breastfeeding, and in illness. If you want to lose or gain weight or have a medical condition, seek advice from a doctor or a registered dietitian.
Frequently asked questions
What is the difference between basal and total energy expenditure?
Basal metabolic rate is the energy the body needs at complete rest for breathing, heartbeat and metabolism. Total expenditure adds movement and digestion.
Why do energy needs fall with age?
Muscle mass usually declines over the years, and many people move less. Both reduce energy use.
Can I plan a diet with the result?
The calculator only gives a rough guide. For changing your weight, professional advice is the best approach.
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Note: This calculator provides general information and does not replace advice from a doctor or dietitian. Your entries are not stored.