All Cat Calculators
Free Tools for Every Cat Question
Every calculator we’ve built — medication dosing, age conversion, nutrition, growth prediction, and more. All free, all run in your browser, all based on vet-standard formulas.
16+
Calculators
100%
Free, no sign-up
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APIs or data sent
WSAVA
Standard formulas
Most Used Calculators
The tools cat owners reach for most
🍽️
Most popular
Cat Food Calculator
How much wet food, dry food, or a mix to feed per day. Results in cans, cups, and grams.
🕐
Popular
Cat Age Calculator
Convert cat years to human years and back. Includes AAHA life stage guide and health tips by age.
🔥Popular
Cat Calorie Calculator
Daily calorie target based on weight, life stage, and body condition. Includes treat budget and weight loss plan.
⚖️Popular
Cat BMI Calculator
Body Condition Score using a guided physical check. Shows ideal weight, amount to lose, and a safe timeline.
💧New
Cat Water Calculator
Total daily water need minus what comes from food — gives the exact amount for the bowl. Adjusts for diet type and CKD.
Growth & Life Stages
4 calculators
📏New
Cat Growth Calculator
Predicts adult size from a kitten’s current age and weight. Based on the validated 16-week rule. Week-by-week milestone calendar included.
🕐
Cat Age Calculator
Cat years to human years, AAHA life stage classification, and age-specific health priorities. Works in both directions.
🐣
Cat Pregnancy Calculator
Due date from mating date. Shows pregnancy progress, this week’s development, and key milestone dates for the calendar.
⚖️
Cat BMI & BCS Calculator
Guided body condition assessment with ideal weight calculation and weight loss timeline.
Nutrition & Feeding
3 calculators
🍽️Popular
Cat Food Calculator
Exact daily food portions in cans, cups, and grams for wet, dry, or mixed feeding. Auto meal schedule by life stage.
🔥
Cat Calorie Calculator
Daily calorie target using the RER formula. Includes weight loss goal switcher, treat budget in kcal, and safe weekly loss timeline.
💧
Cat Water Intake Calculator
Works out total water need, subtracts food moisture, and shows exactly how much to put in the bowl. CKD-aware.
Medication Dosage Calculators
6 calculators — reference use only, always confirm with your vet
💊Medication
Gabapentin for Cats
Dosage by weight for anxiety, acute pain, chronic pain, and seizures. CKD dose adjustment included.
🦋Medication
Methimazole for Cats
Phase-based dosing for hyperthyroidism. Covers diagnosis, maintenance, pre-surgery, and CKD phases.
💉Medication
Prednisolone for Cats
Dosage tiers for anti-inflammatory, immunosuppressive, and palliative use. Includes tapering timeline.
🤢Medication
Cerenia (Maropitant) for Cats
Anti-nausea dosing for vomiting, motion sickness, and post-op recovery. Liver disease flag included.
😴Medication
Benadryl for Cats
Diphenhydramine dosing for allergies, travel anxiety, and pre-vet sedation. Tablet and liquid output.
🍗Medication
Mirtazapine for Cats
Appetite stimulant dosing for healthy cats and CKD patients. Correct q24h vs q48h intervals explained.
Medication calculators provide reference information based on published veterinary dosing guidelines. Always confirm the correct dose with a veterinarian who has examined your cat. Do not change or start medication based on a calculator alone.
Coming Soon
Being built now
🧬
Amoxicillin for Cats
Antibiotic dosage calculator for cats. Coming soon.
🫘
Cat CKD Phosphorus Calculator
Dietary phosphorus calculator for cats with chronic kidney disease. Coming soon.
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Cat Vaccine Schedule
Personalised vaccination schedule from kitten to adult. Coming soon.
Can’t find what you’re looking for?
If there’s a calculator you’d find useful that isn’t on this list, let us know and we’ll consider adding it.
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