Why Use Pawculate?
Pawculate was built by long-time pet owners who were tired of clicking through ad-heavy sites just to estimate how much to feed a dog or when a cat is "senior." Every formula on this site comes from peer-reviewed veterinary literature, established clinical guidelines (AAHA, AAFP, WSAVA), or standard veterinary reference works; never guesswork or AI-generated content.
All calculators run entirely in your browser. No data you enter is sent to any server, stored, or logged. Results are instant, private, and available offline once the page loads.
How Our Formulas Work
We use the Resting Energy Requirement (RER) formula for food calculators, the AAHA/AAFP feline life-stage guidelines for cat age conversion, breed-size-adjusted curves for dog aging, and standard veterinary pharmacology references for medication dosing. Each calculator page includes a full explanation, worked examples, and source citations. Read more on our Methodology page.
While Pawculate strives for accuracy, these tools are for educational reference only. Always consult a licensed veterinarian before making decisions about your pet's health, diet, or medications.