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Cat Food Calculator — Grams per Day by Body Weight

Quick answer

How much should you feed your cat?

  • A 4 kg adult needs about 200 kcal/day — roughly 50 g of dry food or 200 g of wet.
  • Enter weight for a free feeding plan.

Figures are estimates from this calculator’s standard formula — adjust the inputs in the tool below for your exact number.

Weight vs daily needs (dry food at 4,000 kcal/kg)

Cat weightkcal/dayDry food (g/day)
2 kg9524
3 kg14536
4 kg19549
5 kg24561
6 kg29574

How Cat Food Calculator Works

Daily food amount based on weight, activity, age, and food type caloric density

This calculator determines the optimal daily food portion for your cat based on their specific needs and the type of food you're feeding.

  1. 1

    Step 1

    Enter your cat's current weight

  2. 2

    Step 2

    Select their activity level

  3. 3

    Step 3

    Choose their life stage (kitten, adult, senior)

  4. 4

    Step 4

    Select the type of food (dry, wet, or raw)

  5. 5

    Step 5

    View daily, weekly, and monthly feeding amounts

Use Cases

Determining proper portion sizes for your cat

Planning food purchases and budgeting

Transitioning between different food types

Managing weight through controlled feeding

Ensuring adequate nutrition for active cats

Tips

  • 1

    Wet food has fewer calories per gram than dry food

  • 2

    Kittens need more frequent meals than adult cats

  • 3

    Measure food with a scale for accuracy

  • 4

    Adjust portions based on weight changes

  • 5

    Senior cats may need smaller, more frequent meals

Common Mistakes

  • Using volume instead of weight to measure food

  • Not adjusting portions when switching food types

  • Overfeeding treats on top of regular meals

  • Feeding adult food to kittens or kitten food to seniors

  • Not adjusting portions as your cat ages

FAQs

How many calories does my cat need per day?

An adult indoor cat needs about 45–50 kcal per kg of body weight — a 4 kg cat ≈ 180–200 kcal daily depending on activity.

How do I convert calories to grams of food?

Divide daily kcal by the food’s energy density on the label: dry is typically 3,500–4,000 kcal/kg (200 kcal ≈ 50 g) and wet about 800 kcal/kg.

Should I feed dry, wet or a mix?

A mix is common and fine — just count kcal from each type so the combined total stays within the daily requirement.

How much should a kitten eat?

Kittens (up to 12 months) need roughly 2–2.5× adult kcal per kg spread over several meals a day; check with your vet when unsure.

How do I feed a cat that needs to lose weight?

Cut calories gradually by about 20% while keeping protein-rich balanced food, and weigh your cat every two weeks.