How accurate is this calculator?

The calculator uses the feline Resting Energy Requirement (RER = 70 × weight_kg^0.75) combined with standard veterinary life-stage and activity multipliers. It provides a solid starting estimate, but individual cats vary. Monitor your cat's body condition score and adjust portions over time. When in doubt, consult your veterinarian.

What calorie density is used for each food type?

Default values are: dry kibble at 360 kcal/100 g and wet food at 90 kcal/100 g — typical industry averages. You can override these with the exact value from your food packaging for a more precise result.

Should kittens eat more than adult cats?

Yes. Kittens have significantly higher energy needs per kilogram of body weight to fuel rapid growth and development. The calculator applies a multiplier of 2.5 for kittens versus 1.2–1.6 for typical adult cats.

How many meals per day should I feed my cat?

Most adult cats do well on 2 meals per day. Kittens under 6 months benefit from 3–4 smaller meals to sustain their faster metabolism. Senior cats generally tolerate 2 meals. This calculator lets you choose 1 to 4 meals and shows the per-meal portion.

My cat's food bag shows a different amount — which should I trust?

Packaging guidelines are often based on average adult cats and may be conservative or generous. Use this calculator as a cross-reference. If the two estimates differ, consider your cat's body condition — you should be able to feel (but not see) the ribs with gentle pressure.

Does neutered or spayed status affect food needs?

Yes. Neutered and spayed cats have lower energy requirements — typically 10–20% less than intact cats. Consider nudging the activity level one step down to account for this metabolic difference.

Cat Food Portion Calculator

Enter your cat's weight, life stage, and activity level to get an accurate daily food portion and per-meal breakdown for dry or wet food.

Cat Details

Cat's Weight

Life Stage

Kitten Under 1 yr Adult 1–10 yrs Senior 10+ yrs

Activity Level

Low Indoor, mostly sleeping

Moderate Occasional play, some exploration

Active Frequent play, outdoor access

Food Type

Dry Kibble ~360 kcal/100 g Wet Food ~90 kcal/100 g

Custom Calorie Density (optional — from packaging)

kcal / 100 g

Leave blank to use the default for the selected food type.

Meals Per Day

Summary

This tool calculates the recommended daily food portion for your cat based on their weight, life stage, activity level, and food type. It applies the Resting Energy Requirement (RER) formula with standard feline veterinary multipliers to estimate caloric needs, then converts them to grams based on the calorie density of your chosen food. Results include a per-meal breakdown and an optional cups measurement for dry kibble.

How it works

Enter your cat's current weight in kilograms or pounds.
Select the life stage: kitten, adult, or senior.
Choose the activity level that best describes your cat's daily routine.
Select the food type: dry kibble or wet food.
Optionally enter a custom kcal/100 g value from your food packaging for greater accuracy.
Click Calculate to see daily portion, per-meal amount, and a full calculation breakdown.

Use cases

Determine the correct daily kibble amount when switching cat food brands.
Calculate wet food portions for a cat transitioning away from dry food.
Adjust feeding amounts for a kitten growing through its first year.
Reduce portions for an overweight or indoor sedentary cat.
Plan a consistent twice-a-day feeding schedule with equal meal sizes.
Compare how much dry versus wet food your cat needs for the same caloric intake.
Help a new cat owner avoid underfeeding or overfeeding their pet.
Estimate daily food cost by knowing exact daily consumption in grams.

Frequently Asked Questions

Last updated: 2026-06-13 · Reviewed by Nham Vu

Cat Food Portion Calculator

Cat Details

Suggested Feeding Schedule

Calculation Breakdown

Summary

How it works

Use cases

Frequently Asked Questions

Cat Food Portion Calculator

Use the Cat Food Portion Calculator

Cat Details

Suggested Feeding Schedule

Calculation Breakdown

Summary

How it works

Use cases

Frequently Asked Questions