Health & Calculators

Pet Food Portion Calculator

Estimate your dog or cat’s daily calorie requirements (RER / MER) and exact feeding portions in cups and grams.

kg
Food Caloric Density (kcal / Cup)Found on the back of your pet food bag (typically 350–400 kcal/cup for dry kibble).
kcal
Recommended Daily Caloric Intake (DER)
927 kcal / day

Estimated Dry Kibble Portion: ~2.47 cups / day (~235 grams)

Resting Energy (RER): 662 kcal/day • Multiplier: 1.4× (Neutered / Normal Adult)
Daily Calorie Need (DER)927 kcal/day
Resting Metabolism (RER)662 kcal/day
Daily Kibble Amount~2.47 Cups (235g)
Wet Food Equivalent~5.2 Cans (5.5 oz)
Pet Body Weight20.0 kg (44.1 lbs)
Life Stage Multiplier1.4×
Cups per Day2.47Split into 2 meals: 1.24 cups/meal
Grams per Day235gSplit into 2 meals: 118g/meal
Total Daily Energy927 kcalBased on Kleiber's Law

Veterinary Nutrition Disclaimer: Calorie needs vary by individual pet metabolism, body condition score (BCS), environmental temperature, and treat intake. Consult your veterinarian for tailored clinical feeding plans.

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What is Pet Food Portion Calculator?

The Pet Food Portion Calculator calculates your pet's daily Resting Energy Requirement (RER) and Maintenance Energy Requirement (MER) using standard veterinary metabolic formulas ($RER = 70 \times \text{body weight in kg}^{0.75}$). By inputting weight, life stage, and food caloric density, it outputs exact daily gram rations and cup portions for canine and feline nutrition.

Designed for accuracy, speed, and privacy, this tool runs entirely on your local device with zero network latency.

How to Use the Pet Food Portion Calculator

  1. 1
    Select your pet type (Dog or Cat) and enter current body weight in kilograms or pounds.
  2. 2
    Choose your pet's life stage and activity level (e.g., Neutered Adult, Intact, Weight Loss, Puppy, Senior).
  3. 3
    Enter your pet food energy density in kilocalories per cup (default 375 kcal/cup) or kcal per 100g.
  4. 4
    View instant calculated Resting Energy Requirement (RER), Maintenance Energy Requirement (MER), daily cups, and total daily grams.

Formula & Calculation Logic

Calculates resting and maintenance energy requirements using Kleiber's Law and WSAVA nutritional assessment guidelines based on species, weight, and life stage multipliers.

RER = 70 * (Weight_kg)^0.75 | MER = RER * Factor | Daily_Cups = MER / kcal_per_cup

Pet Food Portion Calculator Frequently Asked Questions

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