Free calculators built on published veterinary guidelines. No sign-up, no ads, no guesswork — just the maths your vet uses, made accessible.
Convert your cat's age to human years using the AAFP life-stage curve — not the oversimplified ×7 myth. Includes life-stage label and interpretation.
Try the calculator →Calculate your cat's daily caloric needs using the WSAVA RER formula with MER multipliers. Accounts for weight, neuter status, activity level, and weight goals.
Try the calculator →Estimate your cat's daily water needs based on weight, food type (dry/wet/mixed), activity level, and climate. Includes moisture from food and dehydration signs.
Try the calculator →WhiskerLab tools are built on peer-reviewed veterinary guidelines: AAHA/AAFP Feline Life Stage Guidelines (2021) for age conversion, WSAVA Global Nutrition Guidelines for caloric needs, and established feline hydration research for water intake. Every formula is cited on its tool page. These calculators provide population-level estimates — your vet knows your individual cat's needs.