Dog years to human years, and every other number your pet needs

Age, growth, feeding and safety calculators built on veterinary guidelines. They run in your browser, so nothing about your pet leaves your phone.

Quick age check

Pet
34human years
Mature adult

Full dog age chart and details →

Age

Dog age calculatorDog years to human years, adjusted for size.Cat age calculatorCat years to human years, with the full age chart.

Growth & weight

Puppy weight calculatorHow big your puppy will get, from weight and age.Cat weight chartKitten weight by week and healthy adult ranges.Body condition scoreThe 1–9 scale and your dog’s ideal weight.

Feeding

Dog food calculatorDaily calories, cups and grams for your dog.Cat food calculatorCalories and a wet/dry split for your cat.

Pregnancy

Dog pregnancy calculatorDue date and a week-by-week timeline.Cat pregnancy calculatorKitten due date and what happens when.

Safety

Chocolate toxicityIs the chocolate your dog ate a dangerous dose?Benadryl dosage for dogsDiphenhydramine dose range by weight.

Curves, not magic multipliers

The famous “one dog year equals seven human years” is a straight line drawn through something that bends. Real pets race through their first two years, then settle into a steadier pace that depends on size. So PawCalc shows you the curve behind each answer: drag the explainers on the age, puppy and feeding pages and you can see where the rules of thumb go wrong.

That habit of showing the mechanism, rather than just the number, is the whole idea behind ahaboo, whose narrated explainer on why the Moon has phases works the same way.

Where the numbers come from

  • Age: AAHA Canine Life Stage Guidelines (2019), AAHA/AAFP Feline Life Stage Guidelines (2021) and the DNA-methylation clock from Wang et al., Cell Systems (2020).
  • Feeding: the resting energy formula from the NRC’s Nutrient Requirements of Dogs and Cats and WSAVA Global Nutrition Guidelines.
  • Safety: toxic dose thresholds and drug ranges from the Merck Veterinary Manual and Plumb’s.

Every page lists its sources at the bottom.

Ask a quick dog or cat question

Your question and the result above go to an AI model (via Vercel AI Gateway) to write a short, general answer. It is not a vet and can be wrong. Nothing is stored.

Questions owners ask

How do I convert dog years to human years?
Count the first year as about 15 human years and the second as about 9 more. After that, add 4 to 7 human years per dog year depending on size (small dogs 4, giant dogs 7). The dog age calculator does it for any age.
How do I convert cat years to human years?
A 1-year-old cat is about 15, a 2-year-old about 24, and each year after adds about 4. See the cat age calculator for the full chart.
Is my pet’s data sent anywhere?
No. Every calculator runs in your browser and your inputs are saved only on your device. The optional “Ask a follow-up” box sends your question and result to an AI model only when you press Ask. See privacy.
Can PawCalc replace my vet?
No. The calculators turn published veterinary guidelines into quick estimates. Your vet can examine your pet and knows their history, which no formula does.