About PetCalc

PetCalc was built for pet parents who want quick, accurate answers about their pets — without ads in their face, signups, or hidden paywalls.

Our mission

We believe pet care information should be free, simple, and scientifically accurate. Whether you're wondering how old your dog is in human years, how much to feed your cat, or when to schedule your puppy's next vaccine — our calculators give you a reliable answer in seconds.

What makes us different

• 100% free — every tool, every feature, no premium tiers.
• No signup required — open the page, get your answer.
• Privacy-first— your data stays on your device. We don't store or transmit your pet's information.
• Built on veterinary research — formulas come from AAHA, AVMA, and peer-reviewed studies, not internet myths.
• Mobile-friendly — works perfectly on your phone, tablet, or computer.

A note on accuracy

Our calculators provide good general estimates, but every pet is an individual. Genetics, health conditions, diet, and lifestyle all affect the “real” answer. We always recommend consulting a licensed veterinarian for personalized advice — especially for medical decisions.

How we're funded

PetCalc is supported by display ads and occasional affiliate links to pet products we believe in. This keeps every tool free for users. We'll never let advertisers influence our calculator formulas or recommendations.

Get in touch

Have a calculator suggestion? Spotted an error? Want to partner? Contact us — we read every message.