Top RatedFREE
Cat Food Calculator
Calculate daily portions in grams and cups for dry, wet, or mixed diets adjusted for age, weight, and activity.
cat fooddaily portionsfeeding guide
~40 secTry
22 free cat calculators - no account needed
Cat Calculator - Free Tools for Every Cat Owner
Pick the question you have right now: age, food, weight, kitten growth, pregnancy, litter, carrier size, or safety checks.
22 free toolsNo accountFast mobile answers
Find by Need
What are you calculating?
Feeding & caloriesPortions, kcal targets, and meal planningOpen Feeding & calories Age & life stageHuman years, senior timing, lifespan contextOpen Age & life stage Weight & growthHealthy range, BCS, kitten growth, carrier sizeOpen Weight & growth Safety questionsToxic foods, lilies, medication warningsOpen Safety questions
All Tools
22 Free Cat Calculators, Built for Feline Biology
Unlike generic pet tools, every calculator here is designed around how cats actually work: their unique metabolism, life stages, and health risks.
NewFREE
Cat Feeding Calculator
Calculate exact wet, dry, or mixed feeding portions by kcal, meal count, age, treats, and cat food label values.
cat feeding calculatorwet dry mixedcat portions
~45 secTry
EssentialFREE
Cat Calorie Calculator
Get daily kcal targets using feline RER and MER formulas adjusted for spay status and activity level.
cat caloriesRERMER
~20 secTry
Most PopularFREE
Cat Age Calculator
Convert cat years to human years using the feline-specific aging curve, not the outdated multiply-by-7 dog formula.
cat yearshuman yearslife stage
~25 secTry
EssentialFREE
Cat Weight Calculator
Compare your cat's weight against breed-specific healthy ranges and get a Body Condition Score interpretation.
healthy weightBCSbreed range
~35 secTry
Safety ToolFREE
Cat Toxicity Calculator
Assess risk from lilies, onions, xylitol, and other common cat poisons by amount ingested and body weight.
lily toxicitycat poisonemergency
~20 secTry
NewFREE
Cat BMI Calculator
Assess Body Condition Score, estimate body fat, calculate ideal weight, and generate a safe cat weight-management timeline.
cat bmibody condition scoreideal weight
~45 secTry
NewFREE
Cat Weight Loss Calculator
Build a safe cat diet plan with ideal-weight calories, a gradual timeline, food portions, and hepatic lipidosis warnings.
cat weight lossoverweight catdiet plan
~50 secTry
NewFREE
Cat Wet & Dry Food Calculator
Calculate mixed wet and dry food portions with a ratio slider, hydration dashboard, brand presets, cost estimate, and 7-day transition plan.
wet dry foodmixed feedingcat hydration
~50 secTry
TrendingFREE
Kitten Growth Calculator
Track development milestones and forecast adult size based on your kitten's current weight and breed.
kitten growthadult sizedevelopment
~40 secTry
NewFREE
How Big Will My Cat Get Calculator
Predict adult cat size from kitten age, weight, sex, breed ranges, and growth multipliers with a month-by-month curve.
how big will my cat getcat size calculatoradult weight
~35 secTry
NewFREE
Cat Litter Calculator
Calculate how many litter boxes you need, how much litter to buy, and how often to fully change it.
litter boxcat litterhow many boxes
~15 secTry
EssentialFREE
Cat Exercise Calculator
Plan daily play sessions for indoor cats, seniors, and high-energy breeds to reduce obesity and boredom.
cat exerciseplay timeindoor cat
~20 secTry
NewFREE
Cat RER Calculator
Calculate Resting Energy Requirement with the vet-standard 70 x W^0.75 formula, full steps, and MER scenario table.
cat RERresting energyMER
~30 secTry
NewFREE
Cat Food Carb Calculator
Calculate carbohydrates from cat food Guaranteed Analysis values, convert to dry matter basis, and compare up to four foods.
cat food carbsdry matterdiabetic cat
~45 secTry
TrendingFREE
Cat Lifespan Calculator
Estimate expected lifespan based on breed, indoor or outdoor lifestyle, body condition, and care quality.
cat lifespanlife expectancysenior cat
~25 secTry
Safety ToolFREE
Cat Medication Dosage Calculator
Calculate reference dose ranges for azithromycin, Clavamox, Panacur, gabapentin, and other common cat medications by weight.
cat medication dosageazithromycin catsclavamox dosage
~45 secTry
Safety ToolFREE
Cat Medication Calculator
Reference common OTC dosage estimates with reminders that cats metabolize drugs differently from dogs.
cat dosagemedicationvet reference
~30 secTry
NewFREE
Cat Pregnancy Calculator
Track a queen's 63-65 day pregnancy timeline with milestone alerts, vet windows, and due date countdown.
cat pregnancydue datewhelping
~30 secTry
TrendingFREE
Cat Carrier Size Calculator
Calculate carrier dimensions from your cat's measurements and check airline compliance for cabin travel.
cat carrierIATA sizeairline travel
~30 secTry
Compassion ToolFREE
Cat Quality of Life Calculator
Gently assess comfort with the HHHHHMM scale, cat-specific pain signs, a Feline Grimace Scale prompt, and good-day tracking.
cat quality of lifeHHHHHMM scaleend of life
~5 minTry
NewFREE
Cat Coat & Genetics Calculator
Predict possible kitten coat colors from parent colors or genotypes with sex-linked orange logic, probabilities, and visual previews.
cat geneticskitten colorscoat inheritance
~60 secTry
Why We're Different
Built for Cats.
Not Repurposed
from Dog Tools.
Most pet calculators treat cats like small dogs. They use the same formulas, reference ranges, and assumptions. We do not. Every tool is built from feline-specific biology, veterinary research, and real cat care data.
Feline-Specific Formulas
Cats have unique metabolic rates, aging curves, and nutritional needs. We use formulas validated for cats, not adapted from canine research.
Results in Under 30 Seconds
No registration, no subscriptions, no waiting. Enter your cat's details and get actionable answers instantly.
Works on Any Device
Fully responsive design optimized for mobile. Use it at the vet, at the pet store, or on your couch.
Your Data Stays Private
Cat profiles are stored locally in your browser only. We never collect or share your pet's data with third parties.
How It Works
From Question to Answer in 3 Steps
01
Choose Your Calculator
Pick from 12 specialized tools covering every aspect of cat care, from daily nutrition to emergency toxicity checks.
02
Enter Your Cat's Details
Input basics like breed, weight, age, and activity level. Save a cat profile to skip this step on future visits.
03
Get Visual Results Instantly
Every calculator returns ranges, charts, and next-step guidance, not just a bare number with no context.
Cat Profiles
Save Your Cat Once. Use Every Calculator Instantly.
Create a free profile for each cat: name, breed, age, weight, and activity level. Compatible calculators auto-fill details so you never type the same information twice.
- No account or email required
- Stored locally in your browser
- Supports multiple cats
- Works across all 12 calculators
Local Profiles
Choose a cat
L
ReadyLuna
Ragdoll · 3 yrs
M
ReadyMochi
British Shorthair · 5 yrs
P
ReadyPepper
Domestic Shorthair · 1 yr
Auto-filled form
Breed: Ragdoll
Age: 3 years
Weight: 4.2 kg
Activity: Normal
Try It Now
Start Calculating in Seconds
No signup. No waiting. Just answers.
Young Adult
≈ 28 Human Years
Prime adult years. Most cats look settled and capable here, but weight gain and dental disease can start quietly.
Get Full Age ReportExample Use Cases
Practical Cat Care Scenarios.
These composite examples show common ways cat owners can use calculators to prepare for vet conversations, plan daily care, and turn uncertain questions into clear next steps. They are illustrative scenarios, not individual endorsements.
Scenario
A cat owner needs a clear gram target before changing portions and wants a simple way to compare the plan with their veterinarian.
Scenario
Someone preparing to adopt a senior cat can use life-stage notes to ask sharper shelter and first-vet-visit questions.
Scenario
A multi-cat household can check whether the litter box setup is likely to feel crowded and what a practical next box count should be.
FAQ
Everything Cat Owners Ask About Cat Calculators
Cat age conversion is not a simple multiply-by-seven formula. A cat's first year is roughly equivalent to 15 human years, the second year adds about 9 more, and each year after that adds about 4. A 5-year-old cat is therefore about 36 in human years. Use the Cat Age Calculator for a more precise estimate by life stage and size.
Try related calculator →Based on Veterinary Science
Our formulas reference feline nutrition research, AAFCO-style feeding guidance, and veterinary clinical standards.
Regularly Updated
We review and update calculators when new research or veterinary guidelines are published.
Reference Tool, Not Medical Advice
These calculators are educational reference tools. Always consult a licensed veterinarian for medical decisions.