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Cat food calculator

Estimate a daily cat food portion from weight, life stage, activity, neuter status, meals, and food label calories.

  • Uses RER calorie baseline
  • Shows grams or cups per day
  • Keeps veterinary safety notes visible
Estimate cat food

Inputs

Cat Food Calculator

Inputs

Use current body weight. For young or medical cases, ask a professional.

Check the food label. Dry foods often range from 300-430 kcal per 100 g.

Cup calories vary by brand and kibble density.

Formula and method

Cat calorie method

RER = 70 × weightKg^0.75; daily calories = RER × multiplier

The calculator applies simple calorie multipliers, then divides by kcal per 100 g or kcal per cup.

It avoids medical claims and should not be used for sick, pregnant, or underweight cats without professional care.

Assumptions

  • RER is 70 × weightKg^0.75.
  • Kitten, adult, senior, activity, and neuter factors are conservative estimates.
  • Food density must come from your package label.

Practical examples

Adult indoor cat

4.5 kg adult, normal activity, 380 kcal/100 g

A modest daily gram estimate split by meals

Kitten scenario

Kitten life stage with the same food density

Higher calorie multiplier

FAQ

Is this veterinary advice?

No. It is a planning estimate and does not replace veterinary guidance.

Why are cat portions small?

Cats are smaller and many dry foods are calorie dense, so grams can look modest.

Should I weigh food?

A kitchen scale is usually more consistent than cups.

What if my cat has a medical condition?

Ask a veterinarian before changing food amounts.

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