How many calories per day does a cat need?

A cat needs the nutritional equivalent to 7-10 mice per day. This translates to 20 - 30 calories per pound per day. (some say 15-25 cal/pound).

Calories in canned cat food http://www.geocities.com/jmpeerson/canfood.html

Calories in dry cat food http://www.geocities.com/jmpeerson/dryfood.html