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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.
Multiply the unit's kWh/day by the number of days you'd use it during the period you'd like to calculate. So to estimate an appliance's energy use in kWh per month, multiply its kWh/day by 31 (or 28, 29 or 30 depending on how many days there are in the month you want to measure).