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The calories you burn daily are estimated by multiplying your BMR (basal metabolic rate) times your daily activity factor.

Calorie Calculator

Your BMR is the energy expended by your body at rest - energy you need to maintain bodily functions. This includes things like:

  • beating of your heart
  • respiration
  • body temperature regulation
  • and other body functions

Your BMR is influenced by a number of factors, including age, gender, weight, height, environmental temperature, and dieting and exercise habits.

Age - because of the increased activity of cells undergoing division, the younger the person, the faster the metabolism. The result is a decline in BMR of approximately 2% for every 10 years after age 30.

Gender - because of the greater percentage of lean muscle tissue in the male body, men generally have a 10 - 15% faster BMR than women.

Weight - the heavier a person is, the higher their BMR is since they have more body mass to support.

Height - the taller a person is, the higher their BMR is since they have more body surface area (skin) exposed to the outer elements (greater heat loss).

Environmental Temperature - people living in tropical or very cold climates tend to have BMR's 5 - 20% higher than those living in temperate climates.

Dieting - when someone is on a low-calorie diet, their BMR can drop as much as 20%.

Exercise Habits - consistent exercise can increase a person's BMR, depending on the duration and intensity.

Please enter the required information below to calculate how many calories your body burns on average. This is only an estimate, but should give you an idea of your daily calorie requirements. Also, you must be 19 years of age for this calculator to give an accurate estimate.

Height: feet inches
Weight (in pounds):
Age (in years):
Gender: Male Female
   
DAILY PHYSICAL ACTIVTY LEVEL (select one)
Very Light seated most the day with little movement and no purposeful activity
Light

during day mostly seated work and some low-intensity purposeful activity OR during day work is mostly on your feet and no purposeful activity

i.e. seated work with 30 - 45 minutes walking 3 or more times a week OR standing during most your work day

Moderate

walking, moving most the work day and low-intensity purposeful activity OR regular high-intensity purposeful activity

i.e. moving most the work day and walking 30 - 45 minutes 3 or more times a week OR seated work and 45+ minutes jogging 4 or more times a week

Heavy

most work day is strenuous (involves lifting and brisk walking) and no purposeful activity OR most the work day moving and engage in high-intensity purposeful activity

i.e. moving most the work day and 45+ minutes jogging 4 or more times a week

Very Heavy

most work day is strenuous (involves lifting and brisk walking) with low-intensity purposeful activity OR strenuously training for a competitive sporting event (amatuer or professional)

i.e. most work day is strenuous and walking 30 - 45 minutes 3 or more times a week OR training for competitive tennis team with strenuous workouts 2 - 4 hours 5 or more times a week


 

 

DISCLAIMER: The information provided here on the calorie calculator is to help make informed decisions about your health. It is not a substitute for the advice or treatment given by your doctor. Please consult a registered dietitian or your doctor if you have any questions about the information given on this calorie calculator.

Basal Metabolic Rate (BMR) Equation:

Harris-Benedict equations:

  • Females:
    655 + [9.56(weight in kilograms)]+ [1.85(height in centimeters)] - [4.68(age in years)]}
  • Males:
    66.5 + [13.75(weight in kilograms)] + [5.0(height in centimeters)] - [6.78(age in years)]}
  • Daily Caloric Requirement is BMR multiplied by the activity factor. Activity factors ranged from 1.4 to 2.4.

References:

Bray GA. Appetite control in adults. In Fernstram JD, Miller GP, editors: Appetite and body weight regulation, Boca Raton, FL, 1994, CRC Press.

Harris J, Benedict F. A biometric study of basal metabolism in man. Washington D.C. Carnegie Insitute of Washington. 1919.

Leibel RI. et al. Changes in expenditure resulting from altered body weight, New England Journal of Medicine. 1995, 332:621.

Perls TT. The oldest old, Scientific American. 1996 (Jan), 70.

Shetty PS, Henry CJK, Black AE, et al. Energy requirements in adults: an update of basal metabolic rate (BMR) and physical activity levels (PALS). European Journal of Clinical Nutrition. 1996, 50:S11-S23.

Westerterp KR: Energy expenditure and body composition. In Westerterp-Plantenza MS et al., editors: Food intake and energy expenditure, Boca Raton, FL, 1994, CRC Press.

 

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February 22, 2010

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