PetCalc
Nutrition Calculator

Cat Food Calculator

Calculate exactly how many calories and how much food your cat needs each day. Works for kittens, adults, and senior cats — wet or dry food.

Cat's Weight

Life Stage

Food Type

Daily Calories Needed

303

kcal per day

Daily Portion

0.8 cups

1 cup ≈ 400 kcal

RER: 216 kcal • Activity ×1.4 • Split into 2 meals

How much should I feed my cat?

The amount depends on your cat's weight, age, activity level, and whether they're neutered. The standard veterinary formula starts with RER (Resting Energy Requirement):

RER (kcal) = 70 × (weight in kg)^0.75

Then multiplied by an activity factor: 2.5× for kittens, 1.4× for neutered adults, 1.6× for intact adults, 1.0× for weight loss.

Wet vs Dry Cat Food

Wet Food

~70–85% water. Better for hydration and urinary health. Typical can has 70–100 kcal.

Dry Food

~10% water, calorie-dense. Convenient and good for dental health. Typical cup has 300–450 kcal.

Many vets recommend a mix of both — wet food for hydration, dry food for convenience.

Frequently Asked Questions

How often should I feed my cat?

Kittens need 3–4 small meals per day. Adult cats do well with 2 meals (morning and evening). Avoid free-feeding dry food as cats can easily overeat.

Is my cat overweight?

You should be able to feel your cat's ribs without pressing hard. Looking from above, you should see a slight waist behind the ribs. From the side, the belly should not hang. Ideal weight for most domestic cats is 4–5 kg (9–11 lbs).