How Much to Feed Cat Per Day

One of the most common questions cat owners ask is: how much should I feed my cat? The answer depends on your cat's weight, age, activity level, health status, and the type of food you're feeding. This guide gives you a practical framework for calculating the right daily portion for your cat.

Why Portion Control Matters

Overfeeding is the leading cause of obesity in cats, which in turn increases the risk of diabetes, joint disease, kidney problems, and a shortened lifespan. Underfeeding causes malnutrition and muscle wasting. Getting the portion right is one of the most impactful things you can do for your cat's long-term health.

Step 1: Check the Feeding Guidelines on the Label

Every cat food label includes a feeding guide based on your cat's weight. This is your starting point — not a fixed rule. These guidelines are often slightly generous (manufacturers want you to use more product), so treat them as a maximum rather than a target.

Step 2: Calculate Based on Calories

The most accurate method is calorie-based feeding. Here's how:

Find your cat's Resting Energy Requirement (RER): RER = 70 x (body weight in kg)^0.75
Multiply by a life stage factor:
- Neutered adult: RER x 1.2
- Intact adult: RER x 1.4
- Obese-prone: RER x 1.0
- Weight loss: RER x 0.8
- Kitten (under 4 months): RER x 3.0
- Kitten (4–9 months): RER x 2.5
- Senior (7+ years): RER x 1.1–1.4 depending on condition
Divide by the food's caloric density (kcal/cup for dry, kcal/can for wet) to get your daily portion

Example: A 4.5 kg (10 lb) neutered adult cat has RER = 70 x (4.5)^0.75 = ~234 kcal/day. Multiply by 1.2 = ~281 kcal/day. If feeding a wet food with 90 kcal/can, that's about 3 cans per day.

General Daily Feeding Guidelines by Weight

These are approximate starting points for a healthy adult cat eating a standard commercial food:

5 lb cat: ~150–170 kcal/day
8 lb cat: ~210–240 kcal/day
10 lb cat: ~250–280 kcal/day
12 lb cat: ~290–320 kcal/day
15 lb cat: ~340–380 kcal/day

Wet Food vs. Dry Food Portions

Wet and dry food have very different caloric densities, so portions look very different:

Wet food (3 oz can): typically 70–100 kcal per can
Dry food: typically 300–400 kcal per cup

A 10 lb cat eating only wet food needs approximately 3 cans per day. The same cat eating only dry food needs approximately 2/3 to 3/4 cup per day. For mixed feeding, reduce both proportionally.

To measure dry food accurately, use a proper measuring tool. HINMAY Pet Food Scoops Measuring Cups Set makes portioning dry food quick and consistent — a simple tool that prevents the chronic overfeeding that leads to obesity.

Adjusting Portions Over Time

Your cat's caloric needs change with age, activity level, and health status. Reassess portions:

Every 6 months for healthy adult cats
Every 3 months for kittens (growing fast)
Every 3 months for senior cats (metabolism changes)
Immediately if your cat gains or loses weight unexpectedly

How to Tell If You're Feeding the Right Amount

Use the Body Condition Score (BCS) as your guide:

Too little: Ribs and spine visible without touching; prominent hip bones; no fat cover
Just right: Ribs easily felt but not visible; visible waist from above; slight abdominal tuck
Too much: Ribs hard to feel; no visible waist; rounded or pendulous abdomen

Weigh your cat monthly and adjust portions by 10% if you notice weight trending in the wrong direction.

Special Situations

Pregnant or nursing cats: Feed kitten food free-choice; caloric needs increase dramatically
Cats recovering from illness or surgery: Follow your vet's specific feeding instructions
Cats on prescription diets: Follow the therapeutic feeding guidelines provided by your vet

Final Thoughts

The right daily portion for your cat is one that maintains a healthy body condition score over time. Start with the label guidelines, refine using calorie calculations, and adjust based on monthly weight checks. Measure every meal — eyeballing is the #1 cause of chronic overfeeding in cats.

Back to blog