Cat Calorie Calculator

Compute a cat's daily calorie target by life stage, neuter status, activity and weight goal.

805.5K uses Updated · 2026-05-12 Runs locally · zero upload
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How to Use Cat Calorie Calculator

The Cat Calorie Calculator helps you set daily kcal and per-meal portions for indoor and outdoor cats.

  1. Enter weight in kg or lb — Use a flat surface or dedicated pet scale.
  2. Pick life stage and neuter status — Neutered adult metabolism is roughly 20% lower than intact.
  3. Choose activity and goal — Low + lose for indoor weight-loss; high + maintain for outdoor adults.
  4. Set meals per day — Two to four meals match a cat’s natural prey-sized eating pattern.

Formula & Theory — Cat Calorie Calculator

Cats follow the same RER curve as dogs but with different life-stage multipliers:

RER (kcal) = 70 × weight_kg^0.75
DER = RER × factor(stage, activity, goal)
# kitten ≈ 2.5×, adult intact ≈ 1.4×, neutered ≈ 1.2×, senior ≈ 1.1×

Use Cases for Cat Calorie Calculator

Switching to a new food, planning weight loss for an indoor cat, supporting recovery from illness, or scaling intake for an outdoor working cat.

The Cat Calorie Calculator is a quick reference, not a substitute for veterinary advice. Always cross-check with a vet, especially for medication or toxicity questions.

Frequently asked questions about Cat Calorie Calculator

How accurate are kcal estimates for cats?

They get you within 10–15% on average. Track weight every 2 weeks and adjust by 5–10% as needed.

Free-feed or scheduled meals?

Scheduled meals make weight control much easier and let you monitor appetite changes early.

What about treats?

Keep treats under 10% of daily calories. Subtract treat kcal from meal portions.

Senior cats need fewer calories, right?

Healthy seniors actually need slightly more per kg because they absorb nutrients less efficiently — sarcopenia is a bigger risk than weight gain.

Is my data stored?

No. All calculations happen in your browser; nothing is sent to a server.