Pets & Animals
Free Pets & Animals calculators with instant results, clear explanations and worked examples — no sign-up, available in 9 languages.
Calculators for pet owners: translate your dog or cat’s age into human years, work out feeding portions and weight targets, and estimate other care numbers. Use them to better understand your animal’s stage of life and daily needs — helpful background, not a substitute for your vet’s advice.
All Pets & Animals calculators
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Cat Age Calculator (Cat Years to Human Years)
Convert your cat's age to human years with the vet 15-9-4 method and see its AAHA/AAFP life stage. Not a substitute for veterinary advice.
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Dog & Cat Calorie Calculator
Work out how much to feed your dog or cat: daily calories (RER and DER) by life stage, converted to cups or grams of your food. Free and instant.
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Dog Age Calculator
Convert your dog’s age to human years using the AKC size-based chart and the UC San Diego epigenetic formula, with the AAHA life stage. Free and instant.
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Puppy Weight Predictor (How Big Will My Puppy Get?)
Estimate your puppy's adult weight from its current age, weight, and breed size, with a growth curve.
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