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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.
The basic energy consumption of the human body is 4 kJ/kilogram of body weight and daily hour so to calculate an individuals basic energy consumption: The total energy consumption value is divided by 4.18 kJ in order to convert the value into kilocalories (1 kcal = 4.18 kJ). This calculation represents daily energy consumption. Excess food intake that is not used as energy can be stored in the body as fat. Excessive fat storage can lead to a high body mass index.