Pet Health Questions,
Answered in Seconds.
Convert dog and cat years to human ages, estimate urgent chocolate toxicity risks, and calculate precision daily calorie portions — all free, private, and calculated in your browser.
Veterinary Published Math
Built strictly on peer-reviewed guidelines from the AKC, AVMA, and Merck Veterinary Manual.
100% On-Device & Private
Calculations run locally in your browser. Your pet's weights and numbers are never transmitted or stored.
Built for Loving Pet Parents
Clear, compassionate language designed to give practical guidance right when you need it.
Precision Pet Calculators
Choose a calculator below to get size-adjusted, species-specific calculations instantly.
Dog Age Calculator
Convert your dog's age to human years — properly, using size-adjusted curves instead of the outdated "×7" rule.
Chocolate Toxicity Calculator
Estimate theobromine dose per kg from your dog's weight and the type and amount of chocolate eaten — with clear risk bands.
Pet Food Portion Calculator
Turn your pet's weight and life stage into daily calorie targets (kcal/day) using the standard veterinary RER × factor method.
Cat Age Calculator
Convert your cat's age to human years and see its life stage — from kitten to geriatric — on the accepted feline curve.
The Science Behind Pet Care
In-depth guides explaining how veterinary aging curves work and what to do in food emergencies.
Why One Dog Year Isn't Seven Human Years
The "×7" dog-age rule is a 70-year-old myth. Here's the real science of how dogs age — and the size-adjusted math most vets actually use.
How Much Should I Feed My Cat? The Real Math
Vet nutritionists start from one formula — RER = 70 × kg^0.75 — then multiply by life stage. Here's how to use it, convert to cups, and adjust.
12 Foods Your Dog Should Never Eat (And What To Do If They Do)
Chocolate is only the beginning. The most dangerous human foods for dogs — ranked by how badly they go wrong — plus the exact steps to take after ingestion.
About PetMath
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