Cat Food Feeding Calculator
Not sure how much to feed your cat? Our calculator uses veterinary formulas to estimate your cat's daily caloric needs based on their weight, age, body condition, and activity level — then converts that into cups or cans of their specific food.
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How Much Should I Feed My Cat?
Determining the right amount of food for your cat depends on several factors. According to the Association of American Feed Control Officials (AAFCO), there's no single answer — it depends on your cat's individual metabolic needs.
The Resting Energy Requirement (RER) Formula
Veterinary nutritionists use the Resting Energy Requirement formula as a starting point:
RER = 70 × (body weight in kg)0.75 This gives the baseline calories a cat needs at rest. We then multiply by factors for age, activity, body condition, and neutering status to get the Daily Energy Requirement (DER).
Factors That Affect How Much to Feed
- Age: Kittens need 2-3x the calories per pound of body weight compared to adults. Senior cats (7+) often need 10-20% fewer calories.
- Activity level: Indoor cats burn 20-30% fewer calories than outdoor cats. Adjust portions accordingly.
- Body condition: Overweight cats need calorie restriction (often 80% of maintenance), while underweight cats may need 20% more.
- Spay/neuter status: Fixed cats have a lower metabolic rate, typically needing 20-30% fewer calories.
- Food calorie density: A cup of premium kibble may have 400+ kcal, while budget brands may have around 300 kcal. Always check the label.
Cat Feeding Chart by Weight
Here's a general guideline for adult, indoor, neutered cats eating a food with ~360 kcal/cup:
| Cat Weight | Daily Calories | Cups/Day (360 kcal) |
|---|---|---|
| 6 lbs (2.7 kg) | ~150 kcal | ~0.4 cups |
| 8 lbs (3.6 kg) | ~185 kcal | ~0.5 cups |
| 10 lbs (4.5 kg) | ~215 kcal | ~0.6 cups |
| 12 lbs (5.4 kg) | ~245 kcal | ~0.7 cups |
| 14 lbs (6.4 kg) | ~270 kcal | ~0.75 cups |
| 16 lbs (7.3 kg) | ~295 kcal | ~0.8 cups |
Based on RER × 1.0 factor for neutered indoor adult cats. Your specific cat may vary.
Frequently Asked Questions
How many times a day should I feed my cat?
Most veterinarians recommend feeding adult cats 2 meals per day. Kittens under 6 months should be fed 3-4 times daily. Free-feeding (leaving food out all day) can lead to overeating and obesity, especially for indoor cats.
Should I measure my cat's food?
Yes! Studies show that eyeballing portion sizes leads to overfeeding by 20-40%. Use a standard measuring cup or, even better, a kitchen scale for accuracy. One cup of cat food weighs approximately 4-4.5 ounces depending on the brand.
My cat is always hungry. Should I feed more?
Not necessarily. Some cats are food-motivated regardless of caloric need. If your cat maintains a healthy weight, their portions are likely correct. Consider puzzle feeders, smaller meals spread throughout the day, or higher-protein foods that promote satiety.
How do I know if I'm overfeeding or underfeeding?
Use the Body Condition Score (BCS) system: you should be able to feel your cat's ribs without pressing hard, see a defined waist from above, and notice a slight belly tuck from the side. If ribs are invisible or prominent, adjust food amounts accordingly.
Does wet food require different portions than dry food?
Yes. Wet food typically has 70-80% moisture, so it contains far fewer calories per ounce than dry food. A 3oz can of wet food averages 70-100 kcal, while a cup of dry food averages 300-450 kcal. Always compare based on calories, not volume.