Cat Calculators
Find practical estimates for your cat’s age, feeding and everyday care. Each tool explains its formula, assumptions and sources. Shared tools also support cats; choose a cat option where available.
Source-based educational tools, not independently reviewed by a veterinarian. Estimates are not a diagnosis or a substitute for veterinary care.
Age & everyday care
- Cat Age Calculator
Estimate human-equivalent years and feline life stage from your cat’s age.
- Pet Cost of Ownership Calculator
Estimate monthly, annual and lifetime costs from your own care expenses.
Food, water & weight
- Cat Food Amount Calculator
Estimate daily calories and food grams from weight, feline life stage and food energy.
- Pet Calorie Calculator
Estimate resting and daily energy needs from weight and a cat life-stage option.
- Pet Ideal Weight Calculator
Estimate ideal weight from current weight and body condition score; the dog-labelled weight-loss figure is not cat guidance.
- Pet Water Intake Calculator
Estimate a daily water range from body weight; food moisture and individual health affect actual needs.
Pregnancy, travel & prescribed medicine
- Pet Pregnancy Due Date Calculator
Select cat and enter the mating date to estimate a pregnancy due-date window.
- Pet Travel Crate Size Calculator (IATA)
Estimate crate dimensions from your cat’s standing measurements; confirm carrier requirements before travel.
- Medication Dosage Calculator
Convert a veterinarian-prescribed dose and product strength into an amount per dose. This does not check medicine safety.
Toxicity & exposure
Possible poisoning? Call your vet now. Do not wait for symptoms or a calculator result. Emergency help & poison hotlines →
- Onion & Garlic Toxicity Calculator
Select cat to estimate onion or garlic exposure from body weight, food type and amount eaten.
- Human Medication Toxicity Calculator
Select cat to estimate exposure to selected human medicines using tablet strength, amount and body weight.
Understanding your estimate
Use current measurements and check kg or lb. Feeding estimates need the energy listed on your food label; pregnancy estimates need a recorded mating date. Read each tool’s limitations before interpreting the result. Dose conversions require a veterinarian’s prescription and do not establish whether a medicine is safe for your cat.