Cat Calculators
Cat care calculators — age, calories, BMI, size, chocolate toxicity, quality of life, an interactive age quiz, and fish oil dosage.
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All cat calculators
Cat Age Calculator
Convert cat years to human years using the feline age progression formula.
Cat BMI Calculator
Estimate a cat's body mass index and body condition from weight and length.
Cat Calorie Calculator
Calculate daily cat calorie needs (RER and MER) from weight and activity.
Cat Chocolate Toxicity Calculator
Estimate theobromine toxicity risk for cats from chocolate type, amount, and weight.
Cat Quality of Life Calculator
Score a cat's quality of life across pain, mobility, appetite, and happiness.
Cat Size Calculator
Estimate a kitten's adult weight from current weight and age.
How Big Will My Cat Get Calculator
Predict a cat's adult size from breed, current weight, age, and parent size.
Cat Age Quiz
Estimate a cat's age from teeth, eyes, coat, and mobility with an interactive quiz.
Fish Oil Dosage for Cats Calculator
Calculate daily fish oil (EPA+DHA) dosage for cats from weight and concentration.
Frequently asked questions
A:Year 1 = 15, year 2 = 24, then +4 human years per cat year.
A:RER = 70 × weight^0.75; a typical neutered adult needs ~1.2× RER.
A:Yes — cats are even more sensitive to theobromine than dogs, though they rarely eat it. Any ingestion warrants a vet call.