Estimate a cat's daily energy requirement from its weight.
A cat's daily energy is its resting energy requirement times a factor reflecting whether it is growing, nursing, overweight or a normal neutered adult. Indoor cats are prone to weight gain, so matching calories to a realistic target rather than an ideal number is key to keeping them at a healthy weight.
Cat Calorie Needs (RER/MER)
RER = 70 x weight^0.75; MER = RER x body-condition factor
RER = 70 x weight^0.75; MER = RER x body-condition factor A cat's daily energy is its resting energy requirement times a factor reflecting whether it is growing, nursing, overweight or a normal neutered adult.
Indoor cats are prone to weight gain, so matching calories to a realistic target rather than an ideal number is key to keeping them at a healthy weight.
This calculator takes 2 inputs: Weight, Body condition. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.