Dog Calorie Calculator
Calculate your dog's daily calorie needs using the same RER formula veterinarians use. Enter your dog's details below — all data stays in your browser.
Your Dog's Details
* All data stays in your browser — we never see it.
Saved Calculations
No saved calculations yet. Calculate and save to compare over time.
Compare Scenarios
Compare different activity levels or body conditions for the same dog.
How It Works
Calculation Principle
This calculator uses the Resting Energy Requirement (RER) formula: RER = 70 × (weight in kg)^0.75. This is the same formula board-certified veterinary nutritionists use in clinical practice. We then multiply RER by an activity factor based on your dog's age, spay/neuter status, body condition, and exercise level. The result is your dog's Maintenance Energy Requirement (MER) — the calories they need per day to maintain their current weight.
How to Use
Enter your dog's weight in kg or lbs. Select their age category, activity level, spay/neuter status, and body condition. If you know your dog food's calorie density (kcal per cup), enter that too. Click Calculate to see RER, MER, and recommended daily portion in cups. Save results to track changes over time.
Practical Tips
Weigh your dog monthly and recalculate. Adjust portions by 10% at a time — sudden drops mess with metabolism. If your dog is overweight, use the 'overweight' or 'obese' body condition setting, which automatically reduces calories by 15-30%. Always consult your vet before major diet changes.