How Much Should You Feed a Cat? A Calorie-Based Guide

Why the chart on the bag is the wrong place to start

Almost every feeding mistake begins the same way: the owner follows the chart on the back of the bag. Those charts are generous by design — a pet food company has no reason to make a bag last longer — and they assume an "average" cat that may look nothing like yours. The result is that roughly half of pet cats in developed countries are overweight or obese, which shortens lifespan and raises the risk of diabetes, arthritis, and urinary disease.

The good news is that feeding a cat correctly stops being guesswork the moment you switch from "scoops" to calories. This guide walks through the actual numbers, then translates them back into cups and cans.

Step 1: Estimate your cat's daily calories

A cat's energy need is driven by its lean body weight — not the number on the scale if that number includes excess fat. A widely used starting point for a healthy, neutered adult cat at rest looks like this:

These are maintenance figures for an indoor, neutered adult. A very active young cat may need more; an older, sedentary, or overweight cat usually needs less. Kittens and pregnant or nursing cats have much higher needs and should never be calorie-restricted — see our kitten feeding schedule for those.

Step 2: Turn calories into an actual portion

Every food lists its energy density — usually kcal per cup (dry) or kcal per can (wet) — on the packaging or the maker's website. Divide your cat's daily calories by that number to get the daily amount.

If a dry food provides 400 kcal per cup and your cat needs 200 kcal, that's half a cup per day — often far less than the bag suggests. For a wet food at 80 kcal per 85 g can, 200 kcal is about two and a half cans.

Measure with a proper cup or, better, a kitchen scale. Eyeballing a scoop is the single most common reason cats drift overweight; people routinely over-serve by 20–40% when estimating by eye.

How many meals a day?

Cats are natural "trickle feeders" that would eat 8–12 tiny prey-sized meals across a day in the wild. At home, most do well on two to three measured meals. What matters is that the total is fixed — see our cat feeding schedule for age-by-age timing.

Wet, dry, or both?

This is genuinely debated, and honest guidance names the trade-offs rather than declaring a winner:

• Wet food is roughly 70–80% water, which helps hydration — useful because cats have a weak thirst drive and are prone to urinary problems. It's also more filling per calorie.
• Dry food is convenient, cheaper per calorie, and works in puzzle feeders, but it's calorie-dense and easy to over-serve.
• A combination suits many households and is a perfectly good default.

Our full wet vs. dry comparison goes deeper. Whatever you choose, look for an AAFCO or FEDIAF "complete and balanced" statement for your cat's life stage.

Managing a cat that's too heavy — or too thin

Weight loss in cats must be slow. Cats that lose weight too quickly can develop hepatic lipidosis (fatty liver), a serious and sometimes fatal condition. A safe target is about 0.5–2% of body weight per week, achieved by trimming calories modestly and adding activity — never by crash dieting. If you're not sure where your cat stands, use our guide to telling whether your cat is overweight.

Sudden weight loss, especially with a normal or increased appetite, is different — it can signal hyperthyroidism, diabetes, or intestinal disease and warrants a vet visit rather than simply adding food.

How to know you got it right

Numbers get you close; your cat's body tells you the truth. Weigh your cat every couple of weeks while you're adjusting, and if the trend is wrong, change the daily total by about 10% and reassess. Small, patient adjustments beat dramatic ones every time.