Dog Diet Calculator
Build a personalised diet plan for weight loss, maintenance, or controlled weight gain.
What Is the Dog Diet Calculator?
Build a personalised diet plan for weight loss, maintenance, or controlled weight gain.
Whether your dog needs to lose weight, gain weight after illness, or simply maintain their current condition — this calculator builds a tailored daily food plan with a realistic timeline.
Every result is based on published veterinary research and breed-size-specific growth data — not generic averages. This tool is completely free, works instantly in your browser, and requires no account or sign-up.
How to Use This Calculator
Fill in the required fields above — typically your dog's weight, age, or breed size. Every field has a clear label and hint.
Press the calculate button to get your instant result. No page reload, no account needed, no waiting.
Your result appears immediately below the calculator. It includes the primary answer plus additional context where relevant.
Share, print, or save your result. Always discuss health-related results with your veterinarian before making decisions.
How It Works
For weight loss, the calculator uses the target weight (not current) in the RER formula, then applies a 0.8 multiplier (80% of normal requirements). This creates a calorie deficit that drives safe, gradual weight loss of approximately 1-1.5% of bodyweight per week.
For weight gain, a 1.2 multiplier adds a controlled surplus. For maintenance, 1.0 multiplier maintains current weight. The estimated weeks to goal is calculated at 1.5% bodyweight loss or gain per week — the safe maximum.
Veterinary Research
Every formula is derived from peer-reviewed veterinary studies and clinical guidelines, not guesswork or generic rules.
Instant Results
No page reload, no waiting, no account needed. Enter your details and your result appears immediately.
100% Private
All calculations happen in your browser. Nothing you enter is ever stored on our servers or shared with anyone.
Always Free
Every calculator on Doggy Calculators is and will always be completely free to use — no premium tier, no catch.
Frequently Asked Questions
Sources & References
This calculator's formulas are based on the following peer-reviewed and authoritative veterinary sources:
- WSAVA Global Nutrition Guidelines — RER formula, caloric requirements, and feeding protocols
- Association of American Feed Control Officials (AAFCO) — Nutritional standards for complete and balanced dog food
- National Research Council u2014 Nutrient Requirements of Dogs — Scientific basis for canine dietary requirements
⚠️ These calculators are reference tools only. Always consult a licensed veterinarian before administering medication or making medical decisions.