Simple answers for everyday dog and cat questions
How old is my dog in human years? How much should my cat eat? Is the chocolate my dog just ate dangerous? Our free calculators use published veterinary formulas and show the source on every page.
Age & life stage
Convert your pet's age to human years and see which life stage they are in.
Dog Age CalculatorDog years to human years by size, plus life stage.Cat Age CalculatorCat years to human years and feline life stage.
Food & nutrition
Daily calories, food amounts and which human foods are safe.
Dog Calorie & Food CalculatorDaily calories and cups of food for your dog.Cat Calorie & Food CalculatorDaily calories, cups of dry food and cans of wet food.Can My Dog or Cat Eat This?Food safety checker for 40 common human foods.
Poison checks
Estimate how dangerous chocolate or xylitol is for your dog's weight.
Dog Chocolate Toxicity CalculatorIs the chocolate your dog ate dangerous? Dose by weight.Xylitol Toxicity Calculator for DogsSugar-free gum or candy: xylitol dose in mg/kg.
Pregnancy & litters
Due dates and week-by-week milestones for dogs and cats.
Dog Pregnancy Calculator & Due DateWhelping date and week-by-week milestones.Cat Pregnancy Calculator & Due DateKitten due date and pregnancy milestones.
Why use MewMewo?
- Vet sources. Formulas and thresholds come from the Merck Veterinary Manual, VCA Animal Hospitals, AAFP/AAHA guidelines, Ohio State's veterinary nutrition service and the ASPCA.
- Formulas shown. Every page explains how the number is worked out.
- Pounds or kilograms. Switch units with one tap.
- Honest limits. We say clearly when you should call a vet instead of relying on a calculator.
Emergency? If your pet ate something toxic or seems unwell, call your veterinarian or an emergency vet now. U.S. 24/7 poison lines: ASPCA Animal Poison Control (888) 426-4435 or Pet Poison Helpline (855) 764-7661 (a consultation fee may apply). Do not wait for symptoms, and do not make your pet vomit unless a vet tells you to.