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This table is based upon a dog's Resting Energy Requirements or RER. The RER is the basic amount of energy that a dog would use in a day while remaining at rest. The formula to calculate RER for animals between 2 and 45 kg (5 - 99 pounds) is: RER in kcal/day = 30(body weight in kilograms) + 70. Any activity or variable other than rest will require an increase in energy (RER) and an increase in calories to meet the energy needs. Realize that these numbers are not a reflection of maintenance calories but of resting energy levels.
30% of energy (calories) is used for physical activity while 10% is used in the process of digestion. This is why you can burn more calories by eating smaller meals more often. To determine your basal metabolic rate (BMR), aka how many calories your body burns at rest, use the following formula: W = weight in kilograms (weight (lbs)/2.2) =weight in kg. H = height in centimeters (inches x 2.54) =height in cm.