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 formulas used in veterinary practice.
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 the AAHA life stage guide and health tips for every age.
🔥Popular
Cat Calorie Calculator
Daily calorie target based on weight, life stage, and body condition. Includes a treat budget and weight loss plan.
⚖️Popular
Cat BMI Calculator
Body Condition Score using a guided physical check. Shows ideal weight, the amount to lose, and a safe timeline.
💧New
Cat Water Calculator
Total daily water need minus what comes from food, giving 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 using the validated 16 week rule. Includes a weekly milestone calendar.
🕐
Cat Age Calculator
Cat years to human years, AAHA life stage classification, and health priorities for each age. 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 a 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 a weight loss goal switcher, treat budget in kcal, and a 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. Adjusts for CKD.
Medication Dosage Calculators
7 calculators. Reference use only, always confirm with your vet.
💊Medication
Gabapentin for Cats
Dosage by weight for anxiety, acute pain, chronic pain, and seizures. Includes dose adjustment for CKD.
🦋Medication
Methimazole for Cats
Dosing by treatment phase for hyperthyroidism. Covers diagnosis, maintenance, surgery preparation, and CKD phases.
💉Medication
Prednisolone for Cats
Dosage tiers for inflammation control, immunosuppression, and palliative use. Includes a tapering timeline.
🤢Medication
Cerenia (Maropitant) for Cats
Nausea and vomiting control dosing, including motion sickness and recovery after surgery. Liver disease flag included.
😴Medication
Benadryl for Cats
Diphenhydramine dosing for allergies, travel anxiety, and calming before vet visits. Tablet and liquid output.
🍗Medication
Mirtazapine for Cats
Appetite stimulant dosing for healthy cats and CKD patients. Explains the correct q24h vs q48h intervals.
🧬New
Amoxicillin for Cats
Antibiotic dosing by weight for bacterial infections. Covers tablet and liquid forms with the full course duration.
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.
Fun & Behavior
1 tool
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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