Free Calculators for
Dog & Cat Owners

Veterinary science-based tools to help you understand your pet's health, age, and care needs.

Dog Calculators

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Dog Age Calculator
Find out how old your dog is in human years. Based on peer-reviewed veterinary research — not the outdated "multiply by 7" rule.
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Dog Insurance Calculator
Estimate monthly pet insurance costs based on your dog's age, size, and location. Compare accident-only vs. comprehensive plans.
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Pet Medication Calculator
Calculate safe medication dosages for your dog or cat by weight. Covers common OTC medications and vet-prescribed doses.
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Dog Food Portion Calculator
How much should your dog eat per day? Get daily portion recommendations by weight, age, and activity level.
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Cat Calculators

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Cat Age Calculator
Convert your cat's age to human years. Cats age faster in their first two years — see where your cat really stands.
Coming soon
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Cat Insurance Calculator
Estimate pet insurance costs for your cat based on breed, age, and coverage preferences.
Coming soon

Why Use a Pet Calculator?

Every dog and cat ages differently depending on their breed, size, and genetics. The popular belief that one dog year equals seven human years has been debunked by modern veterinary science. A Great Dane ages far faster than a Chihuahua — and understanding where your pet is in their life stage directly affects the care decisions you make every day.

bowwowpaw brings together the most useful pet health calculators in one place, using peer-reviewed veterinary research as our foundation. Our dog age calculator uses the 2020 UCSD/NIH epigenetic aging study combined with size-based adjustments, giving you accurate, science-based answers in seconds.

Dog Age Calculator

Our dog age calculator uses the logarithmic formula published by Wang et al. (2020) in Cell Systems, the most accurate model available. It accounts for your dog's size — because small dogs live longer and age slower than giant breeds. Enter your dog's age and size, and get their equivalent human age and life stage instantly.

About bowwowpaw

bowwowpaw is a free resource for pet owners who want accurate, easy-to-use tools. All calculations run directly in your browser — no accounts, no tracking, no fees. We're constantly adding new calculators, so bookmark this page and check back soon.