Free pet care tools · Worldwide
Free Pet Health
Calculatorsfor Dogs, Cats & More
Understand your pet’s age, daily nutrition and weight—with practical estimates for everyday care.
For dogs, cats, rabbits, birds, small pets, reptiles, horses and fish. Explore food portions, cage sizing, pregnancy dates and toxicity guidance.
Formulas, assumptions and source links included. Estimates are not a diagnosis or a substitute for veterinary care.
Dog calculators
Dog age, feeding, growth & more →Cat calculators
Cat age, feeding, care & more →- Aquarium Stocking Calculator
- Bird Cage Size Calculator
- Bird Enrichment Needs Calculator
- Bird Food Portion Calculator
- Cat Age Calculator
- Cat Food Amount Calculator
- Dog Age Calculator
- Dog Chocolate Toxicity Calculator
- Dog Food Amount Calculator
- Dog Heat Cycle Calculator
- Grape & Raisin Toxicity Calculator
- Horse Weight Calculator
- Human Medication Toxicity Calculator
- Medication Dosage Calculator
- Onion & Garlic Toxicity Calculator
- Pet Calorie Calculator
- Pet Cost of Ownership Calculator
- Pet Ideal Weight Calculator
- Pet Pregnancy Due Date Calculator
- Pet Travel Crate Size Calculator (IATA)
- Pet Water Intake Calculator
- Puppy Adult Weight Calculator
- Rabbit & Guinea Pig Diet Calculator
- Rabbit Age Calculator
- Reptile Temperature Gradient Calculator
- Xylitol Toxicity Calculator
Built with love for pets
We’re pet lovers and pet parents who know how much our animals mean to us. We created PetHealthCalculator.com to make helpful pet health tools and information easier for families to access.
The calculators and resources are free to use. If you’ve found them useful and would like to help us keep improving the site, you can support the project with a voluntary contribution.
Your support helps with website hosting, maintaining our tools, researching reliable sources, and developing more resources for pet owners.
Supporting us is completely optional. All tools remain free to use.