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How do I calculate my cat's ideal daily calories for weight loss?

Updated on September 23rd, 2025

Pet's info: Cat | American Shorthair | Male | 4 years and 5 months old | 21 lbs

I'm a but confused how to calculate my cats ideal calorie intake per day to get him to loose a few pounds . I would like to get him to 19 or 20 pounds and he is now about 22.5 pounds. I used formula 30 (target weight in kg) + 70, but I see there are other formulas? He is 4 years 5 months old and neutered. He eats hills science perfect weight dry food and he likes fancy feast 3 Oz can food. He is inside 60% of time and outside in and out during day light rest of time. Thank you

1 Answer

Most Helpful Answer

Jenna Beyer, DVM, MBA, cVMA

Answered By Jenna Beyer, DVM, MBA, cVMA

Veterinarian, Certified Veterinary Acupuncturist

Published on August 19th, 2019

You're right, there are lots of ways of doing it. I like using the website below, but really you start by decreasing what Snoops is currently eating by 20% for 1 month and re-evaluate his progress. In general, cats will find more satiety eating wet food over dry food, and it is also lower in carbohydrates and higher in protein. I have had success using the "fancy feast" diet, which is one small can twice a day (making sure to choose the ones that sound like normal cat food, not spinach and cream or eggs and bacon!). If you don't see progress after 1 month, then discuss using a prescription weight loss diet with your vet.

https://petnutritionalliance.org/cat.php
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