How Many Calories Does a Cat Need Per Day?
A healthy adult cat needs roughly 20 to 26 calories per pound daily. See typical numbers by weight and what changes them.
The short answer
Most lean, neutered adult cats need about 20 to 26 calories per pound of body weight each day. A 10 pound cat lands between 200 and 260 calories. Active, intact or growing cats need more. Overweight cats need fewer calories than their current weight suggests.
Typical daily calories by weight
Using the resting energy formula with a neutered adult factor, a 6 lb cat needs about 180 calories. An 8 lb cat needs about 220. A 10 lb cat needs about 260, and a 12 lb cat about 300. Treat these as starting points, not rules.
What moves the number
Age, neutering, activity and body condition all matter. Kittens may need two to three times their resting energy. Indoor, sleepy cats often need less than the formula says. Cats with kidney, thyroid or digestive disease follow their vet’s plan instead.
How to adjust
Feed the starting amount for two to four weeks. Weigh your cat on the same scale each time. If weight drifts, change calories by about 10 percent and check again. Our cat calorie calculator does the first step for you.
Calorie chart by weight and life stage
| Cat weight | Neutered adult | Intact adult | Weight loss (ideal weight) |
|---|---|---|---|
| 6 lb (2.7 kg) | ~178 | ~207 | ~118 |
| 8 lb (3.6 kg) | ~221 | ~258 | ~147 |
| 10 lb (4.5 kg) | ~261 | ~305 | ~174 |
| 12 lb (5.4 kg) | ~299 | ~349 | ~199 |
| 15 lb (6.8 kg) | ~354 | ~413 | ~236 |
All values are calories per day (kcal). The weight loss column uses 0.8 times the resting energy of the ideal weight, not the current weight.
Why 20 calories per pound is only a rule of thumb
The “calories per pound” shortcut hides an important detail: small cats burn more energy per pound than large cats. By the formula, a 6 lb neutered cat needs about 30 calories per pound, while a 15 lb neutered cat needs about 24. A single flat number will overfeed big cats or underfeed small ones.
That is why this site uses the resting energy formula first and a life stage factor second. It scales properly across sizes. If you only remember one thing, remember this: weight is not a straight line with calories.
A worked example
Imagine a 12 lb indoor cat that is spayed and has a body condition score of 5. Her weight in kilograms is 5.4. Resting energy is about 249 calories. Spayed adults use a factor of 1.2, which gives 299. She sleeps most of the day, so apply a low activity factor of 0.9. The result is about 270 calories per day.
Now turn calories into food. Half from wet food is about 135 calories, or 1⅔ cans at 80 calories each. The other half from dry food is 135 calories, or about ⅓ cup at 400 calories per cup. Spread over three meals, that is about 90 calories each. You can run the same steps in the cat food calculator.
Signs your cat’s calories are right
Good signs include steady weight over several weeks, a body condition score of 4 to 5, a visible waist, normal stools and steady energy. You should feel the ribs easily without pressing hard.
Weigh your cat every one to two weeks at first. A baby scale works well. Or weigh yourself holding your cat, then subtract your own weight. Write the numbers down. A trend over weeks matters more than one reading.
Signs the amount is too high or too low
Too much: weight creeping up, no waist, ribs hard to feel, and a belly that sways. Too little: sharp ribs and hips, weight falling, dull coat, low energy.
Begging alone is not a reliable sign. Many cats ask for food because it is routine or because they are bored. Judge by weight and body condition, then change calories in small steps of about 10 percent.
When the standard formula does not fit
Some cats need a plan from a vet, not a calculator. This includes kittens with poor growth, pregnant or nursing cats, whose needs can rise to two or three times resting energy depending on litter size, and cats with kidney disease, diabetes, hyperthyroidism, digestive disease or cancer.
Underweight rescue cats also need care. Feeding a starved cat too much too fast can be dangerous. Ask your vet for a gradual plan.
Common mistakes to avoid
- Using the bag’s feeding chart as the only guide
- Forgetting treats, chews and table scraps
- Not recalculating after spay or neuter surgery
- Judging by weight without checking body condition
- Changing portions by large amounts at once
- Guessing cup sizes instead of using a measuring cup or scale
Frequently asked questions
Do indoor cats need fewer calories? Often yes. Less activity can lower needs, so start with a low or moderate activity factor and watch the scale.Can I feed my cat once a day? Most cats do better with two or more meals. See how often to feed a cat.Do wet and dry food count together? Yes. Add both so the total matches the daily goal. The wet vs. dry portions guide shows how to split calories.How do I check my cat’s shape? Use the body condition score guide.How activity level changes the number
Activity level changes calorie needs by about 10 to 20 percent in either direction. The calculator uses 0.9 for low, 1.0 for moderate, and 1.2 for high activity. A 12 lb spayed cat moves from about 269 calories at low activity to about 359 at high activity.
Most indoor cats fit the low or moderate setting. Pick low if your cat naps all day and rarely plays. Pick high only if your cat runs, climbs, or goes outside daily. When you are unsure, choose moderate and watch the scale.
How age changes calorie needs
Age shifts calorie needs more than most owners expect. Kittens use 2.5 times resting energy under four months and 2 times from four to twelve months. A cat reaches adult needs near its first birthday.
Senior cats vary a lot. Many cats between 7 and 11 years old slow down and gain weight. Some cats over 12 digest fat and protein less well and lose weight. A senior cat that is losing weight needs a vet visit, not a smaller portion. Our senior cat feeding guide covers the details.
Overweight cats need a different starting point
Start with the ideal weight, not the current weight. Each body condition point above 5 means roughly 10 percent extra body weight. A cat at 7 out of 9 is about 20 percent over. A 15 lb cat with that score has an ideal weight near 12.5 lb.
Resting energy at 12.5 lb is about 257 calories. Multiply by 0.8 for weight loss, and the daily goal is about 206 calories. Weigh every two weeks and aim to lose 0.5 to 1 percent of body weight per week. A cat at 7 out of 9 should follow a vet-supervised plan. Our body condition score guide shows how to score your cat.
Calories are only part of a cat’s diet
Calories set the amount. Nutrients set the quality. Cats are obligate carnivores, so they need nutrients such as taurine, arachidonic acid, and preformed vitamin A from animal sources.
AAFCO sets minimums for complete cat foods. Adult maintenance foods need at least 26 percent crude protein and 9 percent fat on a dry matter basis. Growth foods need 30 percent protein. Look for the words “complete and balanced” on the label. Without them, the food is a treat or a topper, even when the calorie count looks right.
Hidden calories add up fast
Treats, toppers, and licks of human food add calories the bowl never shows. One tablespoon of heavy cream holds about 50 calories. For a 260 calorie cat, that is nearly 20 percent of the day.
Keep extras under 10 percent of daily calories, which is about 26 for that cat. Subtract them from meal portions. The cat treat calories guide explains how.
A simple four-week routine
Use the same scale at the same time of day. A gram scale catches small changes that a bathroom scale misses.
- Week 1. Weigh your cat, score body condition, and measure every meal.
- Week 2. Weigh again and write the number down.
- Week 4. Compare the trend. If weight moves the wrong way, change calories by about 10 percent.
- After that, weigh once a month.
When life changes, recalculate
Recalculate after any big change. A spay or neuter surgery, a move, a new pet, or a new medicine can all shift appetite and energy use. Cats that spend time outdoors may also eat more in winter.
Write down the date and the new numbers each time. After a few months, you will see what works for your cat.
Conclusion
Start with resting energy, apply a factor for life stage, and check the result against your cat’s weight and body condition. Adjust slowly. Use the numbers as a trial, not a verdict, and bring your vet in for any cat that is growing, pregnant, ill, or overweight.
Sources and further reading: WSAVA Global Nutrition Guidelines; AAHA Nutrition and Weight Management Guidelines; NRC Nutrient Requirements of Dogs and Cats. This article is educational and does not replace advice from your veterinarian.