16 free tools · vet-checked formulas
Pet calculators that give your pet a real answer.
How big will your puppy get? Is that chocolate dangerous? How much Benadryl is safe? Enter your pet's details and get a personal answer in seconds, plus the "why" behind it.
Dog tools
Puppy weight calculator
Predict your puppy’s adult weight from age and current weight.
Dog years to human years
Size-adjusted dog age calculator using the AVMA chart.
Human years to dog years
Turn your own age into dog years.
Benadryl dosage calculator
Vet-standard 2 to 4 mg/kg dose in tablets or mL.
Dog food calculator
Daily calories and cups for your dog.
Dog pregnancy calculator
Due date and week-by-week whelping calendar.
Dog breed quiz
8 questions to find breeds that fit your life.
Dog name generator
Hundreds of fun, classic and unique dog names.
Is it toxic?
Check the risk by weight, then call your vet if needed.
Cats & fish
Age, food and names for cats, plus a tank planner.
Cat years to human years
Your cat’s age in human years and life stage.
Human years to cat years
Convert your age into cat years.
Cat food calculator
Calories, cups and cans of wet food per day.
Cat name generator
Find the purr-fect name for your cat.
Aquarium stocking calculator
How many fish can your tank hold?
Why our calculators are different
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Real veterinary formulas
Dosing from the Merck Veterinary Manual, age charts from the AVMA, calorie maths used by vets, and published puppy growth curves.
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Personal, not generic
Answers change with your pet's weight, age and size, because a Chihuahua isn't a Great Dane.
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Private and instant
Everything runs in your browser. No sign-up, and nothing you type is sent to us.