How many calories does my dog need daily?

Most adult dogs need 25–30 kcal per kg of body weight daily. The exact amount depends on weight, age, activity level, and reproductive status. A sedentary neutered 10 kg dog needs

What is the RER formula for dogs?

RER (Resting Energy Requirement) = 70 × (body weight in kg)^0.75. This is the gold-standard formula endorsed by the American College of Veterinary Nutrition. It gives the minimum e

Does spaying/neutering change my dog's calorie needs?

Yes — spayed/neutered dogs typically need 20–30% fewer calories than intact dogs of the same size and activity level. Hormonal changes after the procedure reduce metabolic rate. Ou

How often should I recalculate my dog's calorie needs?

Recalculate every 4–6 weeks, whenever your dog's weight changes by more than 5–10%, after life-stage transitions, or after spaying/neutering. Seasonal activity changes also warrant

Is this calculator accurate for all dog breeds?

The RER formula is breed-agnostic and validated for most healthy adult dogs. However, some breeds (Greyhounds, northern working breeds) have atypical metabolic rates. For dogs with

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Calorie Calculator

Calculate your dog's exact daily calorie needs using the veterinary RER formula — adjusted for age, breed size, activity level and reproductive status.

STEP 1 OF 4

🐕 What is your dog's weight?

Use a recent weigh-in (within the last 30 days) for best accuracy.

Weight

Unit

🎂 What is your dog's life stage?

Age significantly changes the energy multiplier applied to the base RER formula.

Puppy under 4 months — Peak growth phase (3.0× RER)

Puppy 4–12 months — Active growth phase (2.0× RER)

Adult 1–7 years — Standard maintenance (1.0× RER)

Senior 7+ years — Reduced metabolism (0.8× RER)

🏃 What is your dog's typical activity level?

Sedentary — Mostly resting, minimal exercise daily

Lightly Active — One short walk per day

Moderately Active — 30–60 min exercise daily

Highly Active — Working/sport dog, 2+ hours daily

⚕️ Any special conditions?

These significantly adjust daily calorie requirements.

Daily Calorie Requirement

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How the Dog Calorie Calculator Works

This calculator uses the Resting Energy Requirement (RER) formula — the veterinary gold standard: RER = 70 × (weight in kg)^0.75. We then multiply by validated life-stage and activity factors to give your dog's Daily Energy Requirement (DER).

📌 Key Takeaways

RER = 70 × weight_kg^0.75 — the ACVN-endorsed formula
Puppies under 4 months need 3× adult RER; seniors need ~20% less
Spay/neuter reduces calorie needs by 25–30% in most dogs
Bag label guidelines overestimate by up to 25% for average neutered adults

Daily Calories by Dog Size

Dog daily calorie reference by size
Size	Weight Range	Adult Calories/Day	Example Breeds
Small	2–9 kg	185–470 kcal	Chihuahua, Shih Tzu, Dachshund
Medium	10–25 kg	470–950 kcal	Beagle, Border Collie, Spaniel
Large	26–45 kg	950–1,500 kcal	Labrador, German Shepherd, Boxer
Giant	46+ kg	1,500–2,200+ kcal	Great Dane, Rottweiler, St. Bernard

Common Feeding Mistakes

✅ Do This

Weigh food with a digital kitchen scale
Recalculate portions every 4–6 weeks
Count treats (max 10% of daily calories)
Reduce calories 25% after spay/neuter

❌ Avoid This

Relying only on bag label cup guidelines
Setting calories once and never adjusting
Giving treats without tracking their calories
Switching foods overnight (causes GI upset)

⚖️ Check Ideal Weight →🏋️ Body Condition Score →

Dog Calorie Calculator