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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.
In order to maintain your weight, the calories you consume must equal the calories you burn. You can easily estimate the number of calories you eat using food labels, but determining the number of calories you burn is a little more difficult. Although the terms are often used interchangeably, basal metabolic rate and resting metabolic rate are two different techniques used to estimate energy requirements to maintain basic body functions.