Free Online Pet Calculators
10 free, science-based calculators for dogs and cats.
Browse all 10 calculators ↓All Pet Calculators
Choose from our collection of 10 free calculators for dogs, cats, and all pets.
Dog Age Calculator
Convert your dog's age to human years
DogCat Age Calculator
Convert your cat's age to human years
CatDog Food Calculator
Calculate daily food portions for your dog
DogPuppy Weight Predictor
Predict your puppy's adult weight
DogCat Calorie Calculator
Calculate daily calorie needs for your cat
CatDog Water Intake Calculator
Calculate how much water your dog needs daily
DogDog Crate Size Calculator
Find the perfect crate size for your dog
DogDog Pregnancy Calculator
Calculate your dog's due date
DogPet Name Generator
Generate creative names for your pet
GeneralDog Exercise Calculator
Calculate daily exercise needs for your dog
DogLatest from the Blog
Science-backed guides to help you care for your pets.
How Much Exercise Does Your Dog Need?
How much exercise does your dog need? The 5-minute-per-month puppy rule, exercise needs by breed, age, and health, and signs of overdoing it.
Cat Calorie Needs: Feeding & Weight Loss
How many calories does a cat need? Learn the RER formula, neutered vs intact multipliers, safe weight-loss speed, and the fatty liver danger of crash diets.
Dog Crate Size Chart: Find the Right Crate
Use the body length + 15 cm rule to pick the right dog crate. Breed size chart, puppy divider tips, and wire vs plastic crate comparison.
Why Choose PetCalc?
Built by pet lovers, for pet lovers. Here's what makes us different.
Free Forever
All our calculators are completely free to use. No sign-up required, no hidden fees, no limits.
Accurate Results
Our calculators are based on veterinary research and established scientific formulas for pet care.
Mobile Friendly
Use any calculator on your phone, tablet, or desktop. Fully responsive and touch-friendly design.
Frequently Asked Questions
Common questions about PetCalc calculators.
How accurate are these pet calculators?
Our calculators are based on established veterinary formulas and peer-reviewed research. While they provide reliable estimates, individual pets may vary. Always consult your veterinarian for specific health decisions.
Are these calculators really free?
Yes! All PetCalc calculators are 100% free to use. No registration, no subscription, no hidden costs. We believe pet care tools should be accessible to everyone.
Do I need to create an account?
No account needed. Simply visit any calculator page and start using it right away. Your results are generated instantly in your browser.
Can I use these calculators on my phone?
Absolutely! All our calculators are fully responsive and work perfectly on smartphones, tablets, laptops, and desktop computers.
Ready to Calculate?
Choose from 10 free calculators and start giving your pet the best care possible.
Get Started Free