All Pet Calculators
& Health Tools

Yes — every calculator on Pet Calculator Hub is completely free, forever. No sign-ups, no paywalls, no ads. We believe every pet owner deserves accurate, vet-informed tools regardless of budget.

Our calculators use published veterinary formulas and species-specific data reviewed by avian and exotic animal specialists. They are designed as informational guides — for medical decisions, always consult a licensed veterinarian who knows your individual pet.

We currently offer 245+ free pet calculators across dogs, cats, birds, small animals, fish, reptiles, and horses. We add new tools regularly — if you can’t find what you need, suggest it via our contact page and we’ll prioritize it.

We cover seven species groups: dogs, cats, small animals (rabbits, guinea pigs, hamsters, ferrets), birds (parrots, budgies, cockatiels, canaries), fish (freshwater and marine), reptiles (bearded dragons, ball pythons, tortoises, geckos), and horses. Each group has its own dedicated hub page with species-specific tools.

Absolutely. Every calculator on Pet Calculator Hub is fully mobile-responsive and works on any device — phone, tablet or desktop. No app download is needed. Simply open your browser and use any tool instantly.

Our tools are designed to inform and guide pet owners, not to replace professional veterinary care. Use the results as a starting point for conversations with your vet, especially for medication dosing, breeding decisions, or health concerns. Always consult a licensed veterinarian for diagnosis and treatment.

We have dedicated age calculators for every species. For dogs, we use the updated DNA methylation formula rather than the old “multiply by 7” rule. For cats, parrots, rabbits, and other animals, each calculator applies the species-specific aging curve researchers have established. Simply pick your species from the filter bar above and look for the “Age” type.

Select your species from the filter and choose “Nutrition” as the type. Every feeding calculator takes into account your pet’s current weight, age, life stage (e.g. kitten vs adult, working horse vs companion), and activity level. For dogs and cats we also factor in whether you’re feeding wet food, dry food, or a mix, and we display results in both metric and imperial units.

Yes — we have dedicated sections for reptiles (bearded dragons, ball pythons, tortoises, crested geckos, snakes) and fish (aquarium sizing, stocking levels, water change schedules, salt dosing, nitrogen cycling). You can browse all reptile tools at petcalculatorhub.org/reptiles and all fish tools at petcalculatorhub.org/fish.

Absolutely! Visit our contact page and describe the tool you are looking for. Popular suggestions go straight to the top of our build queue. We have added dozens of calculators based on reader requests and aim to turn around popular ideas within a few weeks.