Knowing your cat's daily calories is only half the answer — you still have to turn that number into an actual amount of food in the bowl. This calculator converts daily calories into the exact cups of dry food or cans of wet food to feed, split across your cat's meals.
Editorially ReviewedThis is the total amount of this specific food that delivers your cat's daily calories. If you feed a mix of wet and dry, calculate each food's share of the daily calories separately so you don't overfeed.
Why calorie-based feeding beats the bag's cup chart.
How to split portions across food types.
How often to feed by life stage.
Why most pet cats are overfed.
The math is simple division, but it solves a real problem. You know (or can calculate) how many calories your cat needs per day. Every cat food has a calorie density printed on the label. Dividing the two tells you exactly how much food to serve:
Daily food = Daily calories ÷ Food calorie density
For example, a cat needing 200 calories per day, eating a dry food that contains 350 kcal per cup, should get about 0.57 cups per day — a little over half a cup, split into two roughly quarter-cup-plus meals.
The feeding charts printed on cat food bags are one of the most common causes of feline obesity. They're generous by design and based on broad weight brackets that often assume more active or intact cats than the typical spayed/neutered indoor companion. Many indoor cats need 20-30% less than the bag suggests.
Calorie-based feeding sidesteps the guesswork. It accounts for your specific cat's needs and your specific food's density — two numbers the bag chart can't reconcile.
| Cat weight | Lean / active | Average indoor | Weight loss target |
|---|---|---|---|
| 8 lb (3.6 kg) | ~210 kcal | ~180 kcal | ~150 kcal |
| 10 lb (4.5 kg) | ~250 kcal | ~210 kcal | ~180 kcal |
| 12 lb (5.4 kg) | ~280 kcal | ~240 kcal | ~200 kcal |
| 15 lb (6.8 kg) | ~330 kcal | ~280 kcal | ~230 kcal |
| 18 lb (8.2 kg) | ~380 kcal | ~320 kcal | ~260 kcal |
Calorie density differs dramatically between food types, which is exactly why portioning by calories matters:
Feeding both? Decide how to split the daily calories — for example, 60% from wet and 40% from dry — then run this calculator twice, once for each food, using its share of the daily calories. That prevents the classic mistake of feeding a full portion of each.
"Cats evolved as desert hunters with a low thirst drive. They're built to get most of their water from prey. That's the strongest argument for including wet food: it puts moisture back into a diet that dry kibble strips out."
Splitting the same daily total into more meals doesn't add calories — it just changes the per-meal amount. Automatic feeders can help deliver measured meals on schedule if you're out during the day.
An estimated 60% of US cats are overweight or obese. The causes are consistent and avoidable:
Most indoor adult cats need roughly 180-250 calories per day. A typical 10-pound indoor cat needs about 200 calories.
The amount of food that represents depends entirely on the food's calorie density: 200 calories is about 1/2 to 2/3 cup of a 350 kcal/cup dry food, or roughly 2.5 cans of an 80 kcal wet food. Always portion by calories, not by guessing cups.
Bag charts are notoriously generous — based on broad weight ranges and often assuming active, intact, or outdoor cats.
Most pet cats are spayed/neutered indoor cats with much lower energy needs. Following the bag chart is a leading cause of feline obesity. Calculating by actual calorie needs gives a far more accurate portion.
Look for the "calorie content" or "metabolizable energy" statement on the label — it's required on pet food.
Dry food is usually kcal per cup (commonly 300-500). Wet food is usually kcal per can or per kg. If you only find kcal per kg, divide by 10 for kcal per 100g, which this calculator also accepts.
Two meals a day works for most adult cats, though many do better with smaller, more frequent meals that mimic natural hunting. Kittens under 6 months need 3-4 meals.
Free-feeding dry food is a leading cause of obesity; measured meals make weight management far easier. More meals doesn't change the daily total — just the per-meal portion.
Many vets favor including wet food because its moisture supports urinary and kidney health — cats have a low thirst drive and often don't drink enough.
A common approach is wet for one or two meals and measured dry for the rest. Whatever you choose, portion by total daily calories across all foods so you don't double-feed.
Yes. Kittens need roughly twice the calories per pound of adults and should eat kitten formula until about 12 months.
Senior cats vary — some need fewer calories, while others (with kidney disease or hyperthyroidism) need more to hold weight. Calculate the daily target for your cat's life stage first, then convert it here.