Cat Hub – Calculators & Vet-Inspired Guides
Welcome to the Cat Hub on PetCalculators. Use these cat tools and vet-inspired guides to sanity-check your cat’s age, weight, calorie needs and pregnancy stages – always as a complement to, not a replacement for, your vet.
Cat calculators & tools
Quick tools to get realistic, cat-specific estimates.Cat Age Calculator
See your cat’s “human age” with modern charts.
- Uses updated cat age conversion, not a flat “×7” rule
- Helps you think in life stages: kitten, adult, senior
Cat Weight Calculator
Check if your cat’s weight is near a typical range.
- Uses breed/size info where possible
- Designed to be used with the weight chart guide
Cat Calorie Calculator
Estimate daily kcal needs for your cat.
- Based on RER & MER formulas for cats
- Includes indoor, active, and weight-loss options
Cat Pregnancy Calculator
Estimate due dates & pregnancy stages.
- Based on the typical 63–65 day cat gestation
- Works together with the week-by-week pregnancy guide
Cat guides linked to these tools
Cat age
Cat Age Chart: Human Years Conversion Explained
A modern look at how cat years compare to human years, why the old “×7” rule doesn’t work, and how vets think about life stages instead.
Read the cat age chart guide →Weight by breed
How Much Should My Cat Weigh? Healthy Ranges by Breed
Typical weight ranges for different cat breeds, and how to use charts together with body condition instead of chasing a single “perfect” number.
View the cat weight guide →Calories
How Many Calories Do Cats Need? Vet-Based Guide
A step-by-step guide that matches the Cat Calorie Calculator, including examples for indoor, active, overweight and senior cats.
Read the cat calories guide →Pregnancy
Cat Pregnancy Stages (Complete Week-by-Week Guide)
A complete timeline of what usually happens during each week of cat pregnancy, plus key symptoms and when to call your vet urgently.
Read the cat pregnancy guide →How to use the Cat Hub
1. Start with a calculator
Pick the Cat Age, Weight, Calorie or Pregnancy Calculator that fits your question and get a ballpark estimate.
2. Read the matching guide
Each calculator has at least one guide linked above so you can understand how the numbers are calculated and what they mean.
3. Use results as a vet conversation starter
Bring your results and questions to your vet. These tools are designed to support better conversations, not replace a check-up.
Keep this Cat Hub handy
Bookmark this page on PetCalculators to quickly find all cat calculators and guides in one place.