Cats are notoriously easy to overfeed — indoor life means less natural activity, and it’s easy to underestimate how few calories a small body actually needs. Here’s a starting-point chart by weight, the simple math behind it, and the body-condition check that matters more than any number on a chart.
Table of Contents
- Quick Feeding Chart by Weight
- The Simple Formula
- Wet Food vs. Dry Food Calorie Density
- Factors That Change the Number
- Kitten Feeding
- The Most Common Feeding Mistake
- Checking Body Condition
- A Word of Caution on Cutting Calories
- FAQ
Quick Feeding Chart by Weight
This chart assumes a healthy adult indoor cat with average activity. Cats generally need somewhere between 25 and 35 calories per pound of body weight per day — use the lower end for less active or overweight-prone cats, the higher end for more active ones.
| Cat’s Weight | Approx. Daily Calories |
|---|---|
| 5 lbs | 125–175 kcal |
| 8 lbs | 200–280 kcal |
| 10 lbs | 250–350 kcal |
| 12 lbs | 300–420 kcal |
| 15 lbs | 375–525 kcal |
| 18 lbs | 450–630 kcal |
To convert this into cups or cans, check your specific food’s label — cat food calorie density varies a lot, and the label will list kcal per cup (dry) or per can (wet).
The Simple Formula
If you want the actual math vets use: Resting Energy Requirement (RER) = 70 × (body weight in kg)^0.75. From there, an activity multiplier is applied — roughly 1.0 for a sedentary or weight-loss cat, 1.2 for average activity, up to 1.4 for a very active cat — to get the full daily energy requirement. This is the same logic behind feeding calculators you’ll find online, and it’s worth knowing since it’s exactly what your vet uses when calculating a more personalized number for your specific cat.
Wet Food vs. Dry Food Calorie Density
This matters more for cats than it might seem: dry food is roughly 3,500–4,500 kcal per kilogram, while wet food is typically only about 750–1,200 kcal per kilogram, since it’s mostly water. This means a cat eating only wet food will need a much larger volume of food to hit the same calorie target as one eating dry food — and it’s part of why generic “cups per day” advice doesn’t translate well between food types. Always check the actual label of whatever you’re feeding.
Factors That Change the Number
- Activity level. An indoor cat with minimal exercise needs meaningfully fewer calories than an active, playful cat or one with outdoor access.
- Spay/neuter status. Spayed and neutered cats generally need somewhat fewer calories, and many gain weight in the months following the procedure if feeding isn’t adjusted — a gradual 10–15% reduction is often recommended post-surgery, in consultation with your vet.
- Age. Kittens need significantly more calories per pound than adults; senior cats often need fewer, though not always — some seniors with muscle loss need targeted nutrition rather than simply less food.
- Body condition. An overweight cat should be fed for their target weight, not their current weight (more on this below).
- Health conditions. Kidney disease, hyperthyroidism, diabetes, and other conditions can significantly change caloric and nutritional needs — always work with your vet rather than a general chart if your cat has a diagnosed condition.
Kitten Feeding
Kittens need considerably more calories per pound than adult cats to fuel rapid growth, along with more frequent meals — often 3–4 times a day for young kittens, gradually reducing toward the adult schedule of 2 meals a day by around a year old. Kitten-specific food is formulated with the higher protein, fat, and calorie density growth requires, and shouldn’t be swapped for adult food too early. Your vet can help track healthy growth and confirm feeding amounts at each check-up.
The Most Common Feeding Mistake
Feeding for a cat’s current weight instead of their ideal weight. If a food’s packaging recommends a certain portion for a 14-pound cat, but your cat’s healthy target weight is really 10 pounds, following that guideline keeps them overfed indefinitely. The fix is to feed for the target weight, not the number currently on the scale — and to work with your vet on a gradual, safe adjustment rather than a sudden, large cut (see the caution below on why “sudden” matters specifically for cats).
Checking Body Condition
Numbers on a chart are a starting point — how your cat actually looks and feels is the real check:
- Run your hands gently along your cat’s sides — you should feel their ribs with light pressure, without them being visibly prominent
- Looking from above, there should be a visible waist behind the ribcage
- From the side, there should be a slight abdominal tuck, not a hanging belly
If you can’t feel ribs at all, or there’s no waist, it’s time to reduce portions gradually and talk to your vet. If ribs, spine, and hip bones are easily visible with no fat covering, it’s time to increase food and rule out an underlying issue.
A Word of Caution on Cutting Calories
If you need to reduce your cat’s food for weight loss, do it gradually and with your vet’s guidance — not through a sudden, large cut. Cats who lose weight too quickly, especially from a sudden drop in food intake, are at real risk of hepatic lipidosis (fatty liver disease), a serious condition that can develop within just a few days of inadequate eating. This is different from most weight-loss advice for humans or dogs, and it’s an important cat-specific detail worth knowing before you decide to “just feed less” on your own.
FAQ
How many times a day should I feed my adult cat? Two meals a day is standard for most healthy adult cats, though some do well with more frequent, smaller meals — talk to your vet if your cat seems to struggle with hunger between two meals.
Is free-feeding (leaving food out all day) okay for cats? It works for some cats with naturally good self-regulation, but it makes weight gain much easier to miss and harder to track — scheduled meals are generally easier to manage and monitor.
Do treats count toward my cat’s daily calories? Yes — treats should stay under about 10% of daily calorie intake, with the rest of the day’s food adjusted down slightly to compensate.
My cat always acts hungry even after eating enough. What’s going on? This is worth mentioning to your vet — persistent, unusual hunger can sometimes point to an underlying condition like hyperthyroidism, rather than just a food-motivated personality.
Sources referenced for accuracy: PetMD’s cat feeding guide and calorie chart; Chewy and Catster’s feeding portion guidance; Association for Pet Obesity Prevention’s feeding calculator and hepatic lipidosis caution; Nulo’s guide to body condition scoring in cats.