Pet Care Calculators for Dogs & Cats

Vet-informed tools that answer the everyday questions — how old is my pet really, how much should I feed, is this an emergency, what will insurance cost. Free, instant, and private.

Dog Age Calculator

Convert dog years to human years by breed and size — the accurate way, not "times seven."

Cat Age Calculator

Convert your cat’s age to human years and see its life stage and breed life expectancy.

Dog Food Calculator

How much to feed your dog, in calories and cups, based on weight and life stage.

Cat Food Calculator

Portion your cat’s meals to the right daily calories for its weight and age.

Chocolate Toxicity Calculator

Dog ate chocolate? Gauge the danger by weight and type, with emergency vet numbers.

Pet Insurance Calculator

Estimate monthly premiums for dogs and cats by age, size, and state.

Built on veterinary formulas, not guesswork

Every tool here uses the actual science: age conversions from the size-based veterinary convention and the 2020 UCSD epigenetic study; food portions from the RER/MER energy equations; chocolate thresholds from the Merck Veterinary Manual; insurance estimates from NAPHIA industry data. Where a number is an estimate, we say so — and for anything urgent, we point you to a real vet. See our methodology for sources.

When to skip the calculator and call a vet

These tools inform; they don't diagnose. If your pet ate something toxic, is behaving abnormally, or you're simply worried, call your veterinarian or a 24/7 poison line — the chocolate toxicity page lists the numbers. A phone call is always the right move when something seems wrong.