Dog and cat calculators, done right.
Simple, science-backed calculators for dog and cat owners: age in human years, adult weight, daily calories and more. Every number cites its source.
Verified against published sources · no sign-up
Dog Calculators
All 8 dog calculators →- Dog Age CalculatorYour dog’s age in human years, the science-based wayOpen →
- Puppy Weight CalculatorHow big will your puppy get, by breedOpen →
- Dog Pregnancy CalculatorYour dog’s due date from her mating dateOpen →
- Dog Calorie CalculatorHow many calories your dog needs a dayOpen →
- Dog Chocolate Toxicity CalculatorHow much chocolate is dangerous for your dog, by weightOpen →
- Puppy Feeding CalculatorHow much to feed a puppy, by weight and ageOpen →
- Dog Benadryl Dosage CalculatorHow much Benadryl you can give a dog, by weightOpen →
- Puppy Vaccination SchedulePuppy shots by age, from the AAHA’s published guidelinesOpen →
Cat Calculators
All 6 cat calculators →- Cat Age CalculatorYour cat’s age in human years, and why the sources disagreeOpen →
- Cat Pregnancy CalculatorYour cat’s due date from her mating dateOpen →
- Cat Calorie CalculatorHow many calories your cat needs a dayOpen →
- Kitten Feeding CalculatorHow much to feed a kitten, by weightOpen →
- Kitten Age CalculatorHow old your kitten is, estimated from its weightOpen →
- Kitten Growth ChartWhat a kitten weighs at each age, from a published studyOpen →
Adult weights for 181 dog breeds and 11 cat breeds: 121 breeds lead with the American Kennel Club’s official standard, 60 with Wikidata’s public-domain data, and every cat breed with Wikidata. Where the two disagree, the breed page shows both. See every source.