About Pet Parents HQ

Pet Parents HQ is a free collection of calculators for pet parents. Each tool answers one of those questions every owner eventually googles — how old is my dog in human years, how much should my cat actually eat, when is the litter due — with the formulas and charts vets and breeders actually use, explained in plain language.

How our calculators work

Every calculator shows its method — the formula, the chart behind it, and where the numbers come from — so you understand the answer, not just receive it. Where the science has limits (like predicting a mixed-breed puppy's adult size), we say so honestly.

The important disclaimer

Our tools are for general guidance and education. They are not veterinary advice, and no calculator can examine your pet. For anything involving your pet's health — especially possible poisoning, pregnancy, or sudden changes — call your vet. If you're in the US and suspect poisoning, the ASPCA Animal Poison Control Center is (888) 426-4435.

How the site is funded

Pet Parents HQ is free to use and supported by advertising. Ads never influence the numbers our calculators produce. Spotted an error? Tell us — accuracy reports make these tools better for every pet parent.