How Much Should I Feed My Cat? (Daily Feeding Amount Guide + Chart)
If you’ve ever stared at a cat food label and thought, "How much food should I feed my cat per day?" you’re not alone. Most feeding guidelines on bags and cans are broad estimates, and they don’t account for your cat’s lifestyle, metabolism, age, or whether they eat wet food, dry food, or both.
The truth is simple: feeding your cat the right amount is one of the most important things you can do to prevent obesity, diabetes, and long-term health issues.
This guide will explain exactly how much should a cat eat daily, how to calculate calories safely, and how to portion wet and dry food without overfeeding.
Quick Answer: How Much Should a Cat Eat Per Day?
Most healthy adult cats need approximately:
- 20 to 30 calories per pound (45 to 65 kcal per kg) of ideal body weight per day
- 2 meals per day (or 3 smaller meals for better appetite control)
However, the correct amount depends on body condition, age, neuter status, and activity level. Indoor neutered cats usually need less food than outdoor active cats.
Mini Q&A:
Is it better to feed based on weight or calories?
Calories are more accurate because different foods have very different energy density.
Step 1: Check Your Cat’s Body Condition Score (BCS)
Before deciding how much to feed, you must determine if your cat is underweight, ideal weight, or overweight. Many owners underestimate their cat’s body fat because fur hides it.
Veterinarians use a Body Condition Score (BCS) system, commonly a 9-point scale. The WSAVA provides widely used body condition scoring guidelines.
You can learn more about proper body condition scoring from WSAVA global pet nutrition guidelines.
How to Check Your Cat’s Body Condition at Home
- The Rib Test: You should feel the ribs easily with a thin fat layer (like the back of your hand).
- The Waist Check: From above, your cat should have a visible waist behind the ribs.
- The Side Profile: The belly should tuck up slightly. A round hanging belly often means excess fat.
BCS Interpretation (Simple Version)
- BCS 1–3: Underweight (too thin)
- BCS 4–5: Ideal body condition
- BCS 6–9: Overweight to obese
Important: If your cat is overweight, do not feed based on their current weight. Feed based on their target/ideal weight.
Step 2: How Many Calories Does a Cat Need Per Day? (Vet Method)
Veterinary professionals estimate feeding amounts using calories, not cups. This avoids the biggest mistake: different foods have different calorie density.
The RER Formula (Resting Energy Requirement)
The most common veterinary formula is:
RER (kcal/day) = 70 × (Body Weight in kg)^0.75
This gives a baseline calorie estimate. Then we multiply it to get the daily total.
The MER Multiplier (Maintenance Energy Requirement)
To find how much your cat should eat daily, multiply RER by a factor depending on lifestyle.
| Cat Type | MER Factor |
|---|---|
| Neutered adult indoor cat | 1.2 × RER |
| Intact adult cat | 1.4 × RER |
| Inactive / overweight-prone | 1.0 × RER |
| Weight loss plan (vet-supervised) | 0.8–1.0 × RER |
| Kittens (growth) | 2.0–3.0 × RER |
| Pregnant cat | 2.0–3.0 × RER |
| Nursing cat | 2.0–6.0 × RER |
For general veterinary feeding and wellness advice, see AVMA feeding recommendations.
Cat Feeding Amount Per Day Chart (Calories by Weight)
This chart provides realistic calorie estimates for healthy adult cats. Your cat may need slightly more or less depending on activity and metabolism.
| Cat Weight (lb) | Cat Weight (kg) | Estimated Calories Per Day |
|---|---|---|
| 5 lb | 2.3 kg | 170–200 kcal |
| 7 lb | 3.2 kg | 200–230 kcal |
| 9 lb | 4.1 kg | 230–270 kcal |
| 11 lb | 5.0 kg | 250–300 kcal |
| 13 lb | 5.9 kg | 270–330 kcal |
| 15 lb | 6.8 kg | 290–370 kcal |
Mini Q&A:
How much should my cat eat a day if they are lazy?
A low-activity indoor cat usually needs calories closer to the lower end of the range.
How Much Wet Food Should I Feed My Cat Per Day?
Wet food is usually lower in calories per gram because it contains 70–80% moisture. The exact amount depends on the label.
A common guideline is:
- One 3 oz can = about 70 to 110 kcal
- One 5.5 oz can = about 150 to 220 kcal
Wet Food Portion Example
If your cat needs 250 kcal/day and a 3 oz can has 90 kcal, your cat needs:
250 ÷ 90 = about 2.7 cans per day
That would mean about 3 cans daily, split into 2 meals.
For more detail on wet food vs kibble, read: wet vs dry cat food (complete comparison).
How Much Dry Food Should I Feed My Cat Per Day?
Dry kibble is very calorie-dense. Many brands contain 350 to 500 kcal per cup.
This is why cats gain weight quickly when owners free-feed kibble.
Dry Food Portion Example
If your cat needs 250 kcal/day and the kibble has 400 kcal per cup, the correct daily portion is:
250 ÷ 400 = 0.62 cups per day (about 5/8 cup)
Important tip: Use a kitchen scale if possible. Cups are inaccurate.
How Much Should I Feed My Cat Per Day (Wet + Dry Mixed Diet)?
Mixed feeding is common and can be healthy, but the calories must still match your cat’s daily needs.
Mixed Feeding Example (250 kcal/day)
- 1 can wet food (90 kcal)
- Dry food portion = 160 kcal (about 0.4 cups if kibble is 400 kcal/cup)
The total should stay around 250 kcal. The main mistake is feeding a full wet portion and still giving a full kibble portion.
What Factors Change How Much Food a Cat Needs?
Your cat’s calorie needs are not fixed. Even two cats of the same weight can have different daily calorie requirements.
1. Indoor vs Outdoor Lifestyle
- Indoor cats: lower calorie needs
- Outdoor cats: higher calorie needs due to activity and temperature exposure
2. Neutering or Spaying
After neutering, many cats need fewer calories. Appetite often increases while calorie needs decrease.
Mini Q&A:
Why did my cat gain weight after neutering?
Because hormone changes reduce metabolism. Portions must be reduced immediately after surgery.
3. Age (Kitten, Adult, Senior)
- Kittens: need significantly more calories per pound
- Adults: stable calorie requirements
- Seniors: may need fewer calories, but some older cats lose muscle and require higher protein
If you are feeding a kitten, follow this guide: how to correctly feed a kitten (complete guide).
Is Free Feeding Bad for Cats?
Free feeding means leaving food out all day. This can work for some cats, but for many indoor cats it causes weight gain.
Common Problems With Free Feeding
- easy overeating and obesity
- difficult to track appetite changes
- multi-cat homes create food competition
- less meal routine and poor portion control
Scheduled feeding is often safer and easier for weight management.
How Many Times a Day Should I Feed My Cat?
Most adult cats do best with:
- 2 meals per day (morning and evening)
- or 3 smaller meals if your cat vomits from hunger or eats too fast
Some cats benefit from slow feeders or puzzle feeders to prevent fast eating.
How to Measure Cat Food Correctly (Avoid Overfeeding)
Portion control fails when measuring is inaccurate.
Best Tools for Measuring Cat Food
- Kitchen scale (most accurate)
- Measuring cup (less accurate)
- Measuring spoon (good for small portions)
Best practice: weigh the daily portion in the morning, then split into meals.
What Are the Most Common Cat Feeding Mistakes?
Many feeding problems come from simple daily habits.
- feeding too many treats
- free-feeding high-calorie kibble
- not checking calories per cup/can
- feeding human food regularly
- not adjusting portions after neutering
- feeding a poor-quality diet with fillers
If your cat has frequent vomiting, this guide may help: best cat food for vomiting (sensitive stomach guide).
Wet vs Dry Food: Which Helps With Weight Control?
Wet food often helps with weight control because it contains more water and fewer calories per volume. Many cats feel fuller on wet food.
Dry food can be healthy, but portion control is critical due to high calorie density.
For general nutrition information, see PetMD cat nutrition guidance.
The 10% Rule for Treats (Most Owners Ignore This)
Treats should make up no more than 10% of your cat’s daily calories.
Example: If your cat needs 250 kcal/day, treats should be under:
25 kcal per day
Many commercial treats contain 2–5 kcal each, so even “just a few” can cause weight gain over time.
Can I Feed My Cat Homemade Food?
Homemade feeding is possible, but it must be properly balanced. Cats have strict nutritional requirements for taurine, calcium, vitamin A, and essential fatty acids.
Mini Q&A:
Is homemade cat food safe long-term?
Only if it is formulated to meet feline nutrition standards. Random recipes can cause deficiencies.
If you want to do it correctly, read: homemade cat food ultimate guide and healthy homemade cat food recipes.
For nutrition labeling standards, see AAFCO official feeding standards.
Underfeeding vs Overfeeding: What Happens If You Feed the Wrong Amount?
Signs You Are Underfeeding Your Cat
- visible ribs or hip bones
- constant hunger and food obsession
- muscle loss in older cats
- dull coat and low energy
Signs You Are Overfeeding Your Cat
- weight gain over months
- no visible waist
- difficulty grooming
- low activity and heavy breathing
If your cat is underweight and needs safe weight gain, read: best cat food for weight gain (healthy options).
Special Veterinary Warning: Never Crash Diet a Cat
If an overweight cat stops eating suddenly, they are at risk of a serious condition called hepatic lipidosis (fatty liver disease). This can develop quickly and may become life-threatening.
Important safety rule: Never drastically reduce food without veterinary guidance, especially in overweight cats.
For more veterinary clinical information, see VCA Hospitals information on hepatic lipidosis.
When Should You Talk to a Veterinarian?
Calorie calculators are useful, but they are still estimates. You should consult a veterinarian if:
- your cat gains weight rapidly despite portion control
- your cat loses weight unexpectedly
- your cat vomits frequently
- your cat has chronic diarrhea
- your cat refuses food for more than 24 hours
Sudden appetite changes can be caused by medical issues like diabetes, kidney disease, dental pain, or thyroid problems.
FAQ
How much should I feed my cat per day?
Most adult cats need about 200–300 calories per day, but the exact amount depends on weight, activity level, and whether they eat wet or dry food.
How much food should I feed my cat daily?
Feed based on calories. Check the food label and match the portion to your cat’s daily calorie needs using their ideal weight.
How much should a cat eat daily if they are indoor only?
Indoor cats usually need fewer calories, often closer to 20 calories per pound of ideal body weight per day.
How much should my cat eat a day if they are very active?
Active outdoor cats may need closer to 30 calories per pound daily, depending on climate and activity.
How much food does a cat need per day in cups?
It depends on kibble calories. Many dry foods have 350–500 calories per cup, so most cats need about 1/2 to 3/4 cup daily.
How much wet food should I feed my cat per day?
Many adult cats need 2 to 4 small cans daily, depending on calories per can and the cat’s weight.
How do I calculate cat feeding amount per day?
Calculate your cat’s daily calories using RER and MER, then divide by the calories per cup or can listed on the food label.
Should I feed my cat once or twice a day?
Twice daily is best for most cats. Some cats do better with three smaller meals if they vomit from hunger.
Is it bad to leave dry food out all day?
Free-feeding often causes overeating and obesity, especially in indoor neutered cats.
How do I know if I am overfeeding my cat?
If your cat loses their waist, gains weight, or you can’t feel the ribs easily, you are likely overfeeding.
How do I know if I am underfeeding my cat?
If ribs are sharp, hips show, or your cat seems constantly hungry and losing weight, you may be underfeeding.
How much should I feed a senior cat?
Many seniors need slightly fewer calories, but some older cats lose muscle and may need higher protein and careful weight monitoring.
How much should I feed my cat after neutering?
After neutering, reduce calories by about 20–30% and monitor weight weekly to prevent fast weight gain.
Can I feed my cat homemade food every day?
Only if it is nutritionally balanced. Homemade diets often lack taurine and calcium unless properly formulated.
Final Thoughts: The Best Feeding Amount Is the One That Keeps Your Cat Lean
There is no single perfect number that works for every cat. The best approach is:
- start with a calorie estimate
- measure food accurately
- monitor weight every 1–2 weeks
- adjust portions slowly
When done correctly, portion control helps prevent obesity, supports kidney health, improves energy, and can add years to your cat’s life.
Medical disclaimer: This article is for educational purposes only and does not replace veterinary advice. If your cat has sudden weight loss, vomiting, diarrhea, refusal to eat, or rapid weight gain, consult a licensed veterinarian.