245+ free pet calculators covering every species, every health question. Find the right tool for your pet in seconds.
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Convert dog years to human years using the latest DNA-based scientific formula.
πΆ Dogs Β· NutritionHow much should I feed my dog? Get portion sizes by weight, age and activity level.
πΆ Dogs Β· NutritionCalculate your dog's daily calorie needs using the RER formula adjusted for life stage.
πΆ Dogs Β· AgeEstimate your dog's lifespan based on breed, size and health factors.
πΆ Dogs Β· HealthAssess your dog's body condition and check for healthy weight ranges by breed.
πΆ Dogs Β· HealthFind the healthy weight range for your dog's breed and body frame.
πΆ Dogs Β· AgePredict your puppy's adult weight from current weight and age.
πΆ Dogs Β· HealthHow much water does your dog need? Get a daily hydration target in ml/oz.
πΆ Dogs Β· BreedingCalculate your dog's due date β canine gestation is approximately 63 days.
πΆ Dogs Β· HealthWeight-based dosing for common medications. Always confirm dosages with your vet.
πΆ Dogs Β· HealthCalculate the safe Benadryl dose for your dog by weight. Vet-reviewed guidelines.
πΆ Dogs Β· HealthFind the right flea product and dosage based on your dog's weight and age.
π± Cats Β· AgeConvert your cat's age to human years with the updated feline aging formula.
π± Cats Β· NutritionCalculate daily caloric intake for indoor cats, outdoor cats and kittens.
π± Cats Β· NutritionHow much wet and dry food should you feed your cat? Get personalized daily portions.
π± Cats Β· AgeEstimate your cat's lifespan based on breed, indoor/outdoor status and lifestyle.
π± Cats Β· HealthAssess your cat's body condition score and healthy weight range by breed.
π± Cats Β· HealthFind the healthy weight for your cat's breed and frame size.
π± Cats Β· NutritionCalculate portions when mixing wet and dry food to meet your cat's calorie needs.
π± Cats Β· BreedingCat gestation averages 63β67 days. Calculate your queen's due date and milestones.
π± Cats Β· HealthWeight-based feline dosage calculator for common medications and supplements.
π± Cats Β· HealthHyperthyroid cats taking methimazole β calculate the right dose by body weight.
π± Cats Β· HealthCalculate gabapentin dosing for anxiety and pain management in cats.
π° Small Animals Β· AgeConvert your rabbit's age to human years across all life stages.
π° Small Animals Β· NutritionGet hay, pellet and veggie portions tailored to your rabbit's weight and age.
πΉ Small Animals Β· AgeTranslate your guinea pig's age to the human equivalent.
πΉ Small Animals Β· NutritionDaily pellet, hay and vitamin C portions personalized for your guinea pig.
πΏοΈ Small Animals Β· AgeConvert hamster years to human years β hamsters age very quickly!
𦑠Small Animals · AgeConvert your ferret's age to human years and monitor senior health milestones.
π° Small Animals Β· BreedingRabbit gestation is ~31 days. Calculate your doe's due date and litter prep timeline.
π¦ Birds Β· AgeConvert your parrot's age to human years by species β Macaw, African Grey and more.
π¦ Birds Β· NutritionCalculate daily pellet, seed and fresh food portions for your parrot by species.
π¦ Birds Β· AgeConvert your budgie's age to human years and understand their life stages.
π¦ Birds Β· AgeCockatiels live 15β25 years. Convert age and spot senior health milestones.
π€ Birds Β· AgeConvert your canary's age to human years and track life stages.
π₯ Birds Β· BreedingEnter species and lay date to get hatch date and incubation conditions.
π¦ Birds Β· NutritionCalculate your bird's daily caloric requirements by species and body weight.
Common questions about Pet Calculator Hub and how to use our tools.
Yes β every calculator on Pet Calculator Hub is 100% free with no sign-up, no subscription and no paywalled results. We're funded by advertising so all tools stay permanently free to pet owners worldwide.
Our calculators are built on peer-reviewed veterinary research and published clinical guidelines. We review and update them regularly to reflect current science. That said, every animal is an individual β results are starting points, not prescriptions. For specific health or medication decisions, always consult your veterinarian.
We currently have 245+ calculators across dogs, cats, small animals (rabbits, guinea pigs, hamsters, ferrets), birds (parrots, budgies, cockatiels, canaries) and fish. We add new tools regularly β bookmark this page and check back, or follow our Pet Health Blog for announcements.
Absolutely! We love hearing from pet owners about tools they need. Visit our Contact page and tell us which calculator you'd like to see. Most popular requests make it onto our roadmap within a few weeks.