Cat Calorie Calculator

How much should your cat eat? Estimate daily calories, account for treats, then turn the result into food portions.

Your cat

Current weight

Life stage

Spay/neuter status

Body condition score

How do I check body condition?

Look at the waist from above and gently feel the ribs. A long coat can hide body shape. If you are unsure, leave the score blank and ask your vet to check.

Open the WSAVA illustrated chart (PDF)

Activity

Goal

Weight changes need a veterinary body condition assessment.

Meals & treats Starts with 2 meals and no treats

Your routine

Meals per day

Treat calories per day

Enter what you actually give. Leave at 0 if you do not feed treats.

Convert calories to food amounts Optional

Food calories

Optional: kcal per can, cup, pouch, or serving.

Food unit

Feeding safely

Never rapidly restrict calories for cats. If your cat is not eating, call a veterinarian the same day.

Next steps

Put the result into practice.

Plan everyday feeding

Start with weight and body condition, then work through calories and portions.

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What should we improve?

A few common questions

Is this a prescription feeding plan?

Use it as a starting estimate, then follow weight and body condition over time. Ask your vet about feeding during illness, pregnancy, growth or weight loss.

Why does body condition change the result?

A cat above or below ideal condition may need a different target than its current weight. Ask your vet to confirm the score before using a weight-change goal.

About this tool & sources

Your cat's health and history can change what is right for them. Use these results to support a conversation with your veterinarian. They cannot confirm a diagnosis or prescribe treatment.

Updated 2026-09-03