How Much to Feed a Cat: Daily Amounts by Weight and Life Stage

To feed a cat the right amount, start with the feeding guide on its complete food, measure that daily portion, then adjust up or down to keep the ribs easy to feel and a clear waist visible from above. There is no single number that fits every cat: the right amount depends on weight, life stage, activity, and whether the food is wet or dry. The pack guide gets you close; your cat’s body tells you the rest.

This article sits within our cat nutrition guide and pairs closely with our advice on cat obesity and weight loss. Here is how to settle on a daily amount and keep checking it.

Start with the feeding guide on the pack

Every complete cat food carries a feeding guide, and that is where to begin. The guide is a table that sets a daily amount against your cat’s body weight, and often its life stage, because a complete food is formulated to meet a cat’s full nutritional needs at that ration. Find your cat’s weight on the table and read off the recommended daily amount; if you do not know the weight, your vet can weigh your cat in seconds, or you can weigh yourself holding the cat and subtract.

Treat the pack figure as a calibrated starting point, not a fixed law. These guides are averages for a neutered cat of typical activity, so a lively young cat that goes outdoors may need a touch more, and a quiet indoor cat often needs less. Cats are obligate carnivores and need a complete food (one supplying taurine, which plant-only diets lack), so do not try to build a ration from scraps.

Match the amount to weight and life stage

The single biggest drivers of how much a cat eats are its weight and its life stage. Kittens (birth to about one year) need far more energy per kilogram than adults because they are growing, so they eat more relative to their size and across more meals; our kitten feeding guide covers that schedule. Young adults (about one to six years) and mature adults (about seven to ten years) settle into a steadier ration, while senior cats (about eleven years and older) often need their amount and food revisited as their metabolism and muscle change.

Use a food formulated for the right life stage and follow its specific guide. When you change foods or life-stage formulas, transition gradually over about seven days, mixing increasing amounts of the new food into the old, to avoid an upset stomach.

Measure every meal

Measuring is the step most owners skip, and it is the one that matters most. Pouring food by eye almost always means pouring too much: a small dry-food error of a few extra grams each day is a meaningful fraction of a cat’s daily calories, because cats are small and their requirements are modest. Use kitchen scales for accuracy, or a proper measuring cup if the pack lists amounts by volume, and measure the same way each time.

I learned this the hard way with my own cat, Mabel. I had been topping up her bowl whenever it looked low, convinced she was a “good eater,” and over a year she quietly went from trim to round. When my vet had me weigh her food, the daily amount I was actually giving was well above the pack guide. Switching to scales, with her portion split into two measured meals, brought her back to a healthy weight over a few months without a single dramatic diet. Nothing else changed; I just stopped guessing.

Adjust to body condition, not the number

Once the food is measured, your cat’s body condition is the real guide, and it overrides the pack number. Body condition scoring is a simple hands-on check: run your hands along your cat’s ribs and over its spine, then look down from above. In an ideal cat you can feel the ribs easily under a thin fat layer, the spine is not knobbly, and there is a clear waist behind the ribs when viewed from above and a slight tummy tuck from the side.

If the ribs are hard to find and the waist has gone, reduce the daily amount; if every rib stands out and there is no fat cover, increase it. Make changes gradually and re-check every two to three weeks, because weight in a small animal shifts slowly and crash dieting is dangerous for cats. Feeding to body condition is the principle vets return to again and again, and it is why obesity, a leading preventable problem that raises the risk of diabetes and joint disease, is so often a measuring problem first.

Count treats, water, and the whole day

What goes in the bowl is not the whole story: treats and extras count toward the daily total. Treats should make up no more than about 10 percent of daily calories, with the remaining 90 percent from a complete food; the saucer of leftovers, the lick of cream, and the handful of biscuits all add up fast in an animal this size. If you give treats, take a little off the measured meals to keep the day balanced.

Spread the ration across the day in a way that suits your cat: two measured meals work for most, but splitting the same amount into several small portions or a puzzle feeder matches a cat’s natural grazing and adds enrichment without adding calories. Keep fresh water always available, and if your cat eats mostly dry food, encourage drinking; our guide on getting a cat to drink more water has practical tricks.

When to ask your vet

Bring your vet into the picture whenever the amount is not working. Ask for help if your cat is gaining or losing weight despite a measured ration, is constantly begging, will not eat, or has a health condition such as kidney disease that changes its dietary needs. Your vet can set a realistic target weight, calculate a precise daily calorie figure for that target, and recommend a suitable food, which takes the guesswork out entirely.

This guide is general information, not a diagnosis. Your own vet knows your cat’s weight, history, and health, and should confirm the right amount and food for your individual cat.