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Pet Daily Calorie Calculator

Estimate the daily calories (DER) a dog or cat needs from its body weight and life stage (intact or neutered, puppy or kitten, senior, weight loss and more). See the resting energy requirement (RER) and activity factor breakdown too.

Input

Estimate your pet's daily calorie needs (DER) from its body weight and life stage. The figure is calculated by multiplying the resting energy requirement (RER) by an activity factor, so treat it as a reference: actual needs vary with the individual, activity level and health.

Animal
kg
Life stage / condition

An activity factor matching the condition is applied automatically.

Result

Estimated daily calorie need for your Dog

374kcal/day

Condition:Adult dog (spayed / neutered)

Daily need (DER)

374 kcal

Resting (RER)

234 kcal

Activity factor

× 1.6

Body weight

5.0 kg

Calculation breakdown

ItemValue
Body weight5.0 kg
Resting energy requirement RER (70 × weight^0.75)234 kcal
Activity factor (Adult dog (spayed / neutered))× 1.6
Daily calorie need DER (RER × factor)374 kcal

Note: these are general estimates only. Adjust the amount of food to each product's calorie content (kcal/g) and consult your veterinarian as you watch for changes in condition and weight.

How it works

  • The daily calorie need (DER) is found by multiplying the minimum resting energy requirement (RER) by an activity factor that reflects activity level and condition.
  • RER is calculated as 70 × body weight (kg)^0.75, and DER is that value multiplied by a species- and life-stage-specific activity factor (about 1.6 for a neutered adult dog, 1.8 if intact, 1.2 for an adult cat, lower during weight loss, and 2 to 3 for puppies and kittens).
  • The figures shown are general estimates only. Even at the same weight, the requirement changes with breed, activity level, age and health.
  • Adjust the actual amount of food to the calorie content stated on the product packaging (kcal/g or kcal per piece), tuning it as you watch for changes in weight and body condition.
  • Requirements change significantly with obesity, chronic illness, or special states such as pregnancy and lactation, so always consult your veterinarian.