How Much to Feed Your Cat: UK Portion Guide

How much should I feed my cat? It's the question I hear most often in the consulting room, and the honest answer is: probably less than you're giving right now. Roughly one in four UK cats is overweight or obese according to the PDSA's annual PAW report, and almost every one of those cases started with a scoop that was a bit too generous and a bowl that was topped up without thinking.

Portion size matters more than brand, more than wet versus dry, and more than any premium ingredient list. You can feed a supermarket food in the right amount and keep a cat lean, or feed an expensive veterinary diet in the wrong amount and watch the weight pile on. This guide gives you the numbers, the method, and the tools to get portions right for your specific cat, whether you feed kibble, pouches, or a mix of both.

Why Portion Size Matters More Than the Brand

Cats are obligate carnivores with a very small stomach and a metabolism designed for frequent small meals, not two big bowls a day. When they get more calories than they burn, the surplus lands as body fat, and excess weight in cats is linked to diabetes, arthritis, urinary problems, and a shorter lifespan. The PDSA estimates that a fifth of UK cats are already carrying too much weight, and the trend has been getting worse for a decade.

The tricky part is that every cat is different. A neutered indoor cat needs fewer calories than an active outdoor hunter of the same weight. A kitten needs more per kilo than a senior. The feeding chart on the bag is a starting point, not a rule, and it's usually written for an active adult cat, which most UK cats are not.

How to Work Out Your Cat's Daily Calories

Start with a simple maintenance figure: an adult cat needs roughly 40-50 kcal per kilogram of body weight per day. For a typical 4kg cat, that's 200-250 kcal. For a 5kg cat, it's 250-300 kcal. Neutered indoor cats sit at the lower end of that range, active outdoor cats at the top.

Once you have the daily calorie target, check the kcal figure on the food packaging. Every complete cat food in the UK must state its energy content, usually as kcal per 100g or per pouch, and that number is your real guide. The feeding guide on the bag often suggests more than your cat needs, because the manufacturer wants to sell food and because the chart is averaged across very different cats.

Dry Food Portions: the Calorie-Dense Trap

Dry kibble is the easiest food to overfeed because it's compact and calorie-dense. Most dry cat foods sit between 350 and 450 kcal per 100g, which means a 4kg cat eating 200-250 kcal a day needs only 50-60g of kibble, roughly two-thirds of a standard measuring cup. That looks like almost nothing, which is exactly why so many cats get double rations.

A budget-friendly dry option that makes the math easy is IAMS Adult Complete Dry Cat Food Chicken in the 3kg bag. At around 55-60g per day for a 4kg cat, a single bag lasts well over a month, which makes it one of the cheapest ways to feed a cat properly. It's a complete food with balanced protein and added taurine, and it's widely available in UK supermarkets and online.

If you'd rather have a smaller bag while you dial in the right portion, Purina ONE Chicken Dry Cat Food in the 800g bag is handy for testing how much your cat actually eats. Purina ONE includes a live bacteria supplement for gut health, and the smaller pack means you're not committing to a huge bag before you've confirmed the feeding rate.

For owners who want a veterinary-recommended option with a precise feeding table, Hill's Science Plan Adult Chicken dry food is formulated with controlled calorie levels and includes clear portion guidance per weight band. It costs more per kilo, but the feeding chart is one of the easiest to follow for portion control.

UK brand Scrumbles Sensitive+ Chicken Grain Free Dry Cat Food is a good premium pick for cats with sensitive stomachs. It's grain-free with 73.5% free-run chicken and prebiotics for digestion, and the smaller 700g bag is useful if you're switching foods gradually and want to monitor portions closely.

Wet Food Portions: Pouch Math

Wet food is easier to portion because it comes in single-serve pouches and tins, but the calorie content varies a lot between products. Most UK wet cat foods sit between 70 and 100 kcal per 100g pouch, so a 4kg cat needs roughly three 100g pouches a day, or two pouches plus a small dry top-up.

A reliable everyday option is Felix Doubly Delicious Meat Selection in Jelly. Each 100g pouch is around 70-80 kcal, so three pouches a day covers a 4kg cat, and the meat selection gives some variety without breaking the budget. It's the kind of food most UK cats will eat without fuss, which matters when you're trying to hit a calorie target.

For households that want convenience in bulk, Whiskas 1+ Adult Mixed Selection in Jelly comes in an 84-pouch pack. Each 85g pouch is portioned for a single meal, and at roughly 60-70 kcal per pouch, four pouches a day covers a 4kg cat's needs. The variety pack helps if your cat gets bored of eating the same flavour twice a day.

Mixed Feeding: How to Split the Portions

Most UK vets, myself included, are happy with a mixed feeding approach: wet food for moisture and palatability, dry food for convenience and dental abrasion. The key is that the portions add up to the daily calorie target, not that each meal is a full ration on its own.

Here's a workable split for a 4kg cat on 220 kcal a day:

• Morning: one 85-100g pouch of wet food (about 70-80 kcal).
• Evening: 30-35g of dry kibble (about 130-150 kcal).
• Optional lunch: a small measured portion of dry food if your cat is on three meals a day.

If your cat is on an all-dry diet, keep the total at 50-60g a day for a 4kg cat. If it's all-wet, aim for 250-300g a day. Adjust once a week based on body condition, and always leave fresh water down, especially if dry food makes up most of the diet.

Kittens, Seniors, and Special Cases

Kittens under six months need three to four meals a day of kitten-specific food, because their stomachs are small and their energy needs per kilo are roughly double an adult's. From six months to a year, drop to two to three meals and switch gradually to adult food. Senior cats over seven often need slightly fewer calories and more digestible protein, and cats with kidney disease or diabetes need specific veterinary diets with portions set by your vet, not by a chart.

Pregnant and nursing queens are the exception to every portion rule. They can need two to four times their normal intake while feeding kittens, and free-feeding a nutritionally complete kitten food is usually the pragmatic answer until the litter is weaned.

Tools That Make Portion Control Easy

The single best investment for cat feeding is a way to measure accurately. Eyeballing a scoop drifts by 20-30% within a week, and that drift is how cats gain weight. A pet food measuring scoop with clear markings costs a few pounds and gives you a consistent portion every single meal. Look for one with a long handle so it reaches the bottom of a big kibble bag without coating your hand in dust.

If your cat inhales its food and then begs for more, portion control is only half the battle. The Nina Ottosson Lickin' Layers puzzle feeder slows a fast eater right down by making it work for each mouthful. It also provides mental stimulation, which reduces the boredom-driven begging that leads owners to overfeed in the first place. A slow feeder is not a toy to be ignored: introduce it with treats before putting a full meal in it.

When to Adjust Your Cat's Portions

Check your cat's body condition every couple of weeks. You should be able to feel the ribs easily under a thin layer of fat, and the cat should have a visible waist when viewed from above. If you can't feel the ribs, cut portions by 10-15%. If the ribs are very prominent, increase by 10% and recheck in a fortnight.

Watch for the signs that portions need attention: a cat that finishes every bowl and still cries for food may genuinely need more, but it may also be bored, thirsty, or developing a medical issue like hyperthyroidism. A sudden increase in appetite with weight loss always warrants a vet check. Conversely, a cat that leaves food regularly is eating too much, and leftovers should be removed after 30 minutes for wet food rather than left to graze.

Frequently Asked Questions

Final Verdict

Getting cat portions right is not complicated, but it does require measuring instead of guessing. Work out your cat's daily calorie target from its weight, read the kcal figure on the food label, and split the total into two or three weighed meals. Reassess body condition every fortnight and adjust by 10% either way.

Start with a consistent measuring scoop and a set meal schedule. If you're feeding dry food, IAMS Adult Complete or Hill's Science Plan both make portion control straightforward. If you prefer wet food, Felix and Whiskas pouches are portioned for single meals. And if your cat eats like it's in a race, add a slow feeder before you add more food.

Feed the cat you have, not the one on the bag. Measure every meal, weigh every fortnight, and you'll keep your cat at a healthy weight without a single expensive diet food.

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Last reviewed: July 31, 2026 · Evidence-based content · Contains affiliate links