Free Small Animal Calculators
& Health Tools
From rabbit age in human years to guinea pig food portions, hamster lifespan and ferret care — all 30+ small animal calculators in one place. Vet-informed. No sign-up. No ads.
Most Popular Small Animal Calculators
Start with the tools small pet owners use most — quick, accurate, and always free.
Rabbit Age Calculator
Convert your rabbit’s age to human years and understand each life stage from kit to senior.
Guinea Pig Age Calculator
Translate your guinea pig’s age into human years and understand what life stage they’re in.
Hamster Age Calculator
Convert your hamster’s age to human years. Hamsters age rapidly — 1 month ≈ 2 human years.
🐇 Rabbit Calculators
Age converters, nutrition tools, pregnancy guides and health calculators for your bunny.
Age & Health
3 ToolsRabbit Age Calculator
Convert your rabbit’s age to human years and understand each life stage from kit to senior.
Calculate →Rabbit Life Expectancy
Estimate your rabbit’s lifespan based on breed, size, diet and indoor vs outdoor living.
Calculate →Rabbit Weight Calculator
Track healthy weight ranges for different rabbit breeds and spot overweight signs early.
Calculate →Nutrition
3 ToolsRabbit Food Calculator
Determine the right daily hay, pellet and fresh veggie amounts for your rabbit’s weight and age.
Calculate →Rabbit Calorie Calculator
Calculate your rabbit’s daily calorie needs to maintain an ideal body condition score.
Calculate →Rabbit Water Calculator
Find out how much water your rabbit needs daily. Hydration is critical for GI health.
Calculate →🐹 Guinea Pig Calculators
Nutrition, age and health tools tailored to guinea pigs — the beloved cavies.
Age & Health
3 ToolsGuinea Pig Age Calculator
Translate your guinea pig’s age into human years and understand what life stage they’re in.
Calculate →Guinea Pig Weight Calculator
Track healthy weight ranges. Guinea pigs should be weighed weekly to catch health issues early.
Calculate →Guinea Pig Lifespan
Estimate how long your guinea pig may live based on breed, diet and care quality.
Calculate →🐹 Hamster Calculators
Age, nutrition and enrichment calculators for Syrian, dwarf and Roborovski hamsters.
Hamster Age Calculator
Convert your hamster’s age to human years. Hamsters age rapidly — 1 month ≈ 2 human years.
Calculate →Hamster Food Calculator
Find the ideal daily seed, pellet and fresh food portions for your hamster’s weight and species.
Calculate →Hamster Lifespan Calculator
Syrian hamsters live 2–3 years; dwarf hamsters 1.5–2. Estimate your hamster’s life expectancy.
Calculate →Hamster Wheel Size Calculator
Find the correct wheel diameter for your hamster’s size to prevent back problems.
Calculate →🦔 Ferrets & Gerbils
Health and nutrition tools for ferrets, gerbils and other small companion animals.
Ferret Age Calculator
Convert your ferret’s age to human years and track health milestones across life stages.
Calculate →Ferret Food Calculator
Ferrets are obligate carnivores. Calculate the right high-protein daily portions for your ferret.
Calculate →Gerbil Age Calculator
Understand your gerbil’s life stage in human years and tailor their care accordingly.
Calculate →Why Small Animal Owners Trust Us
Accurate, vet-informed tools built specifically for small pet owners.
Species-Specific
Every calculator is tailored to the unique biology of rabbits, guinea pigs, hamsters and more.
Vet-Informed
Formulas and reference ranges are based on published veterinary and exotic animal research.
Instant Results
Get your answer in seconds — no sign-up, no email, no waiting. Just enter and calculate.
Always Free
Every tool is completely free. We believe every small pet deserves quality care — regardless of budget.
Frequently Asked Questions
Common questions from small animal owners using our calculators.
Our calculators use formulas drawn from peer-reviewed exotic animal veterinary research. They provide reliable estimates for healthy animals under normal conditions. Individual variation, health conditions, pregnancy, and unusual breeds may produce different results. Always verify with your exotic vet when in doubt.
Yes — most of our small animal calculators work across breeds. Where breed matters (such as weight targets or lifespan estimates), we provide breed-specific options so you get accurate results for dwarf rabbits, giant rabbits, American guinea pigs, Abyssinians, and more.
The standard recommendation is unlimited timothy hay — it should make up 80–90% of your rabbit’s diet. Our Rabbit Food Calculator gives you precise daily hay, pellet and fresh veggie amounts based on your rabbit’s exact weight and age, so you never have to guess.
Absolutely — hamsters, guinea pigs, rabbits and ferrets have very different metabolisms, nutritional needs and lifespan curves. Using a species-specific calculator gives far more accurate results than a generic small animal tool. That’s exactly why we’ve built separate calculators for each species.
No — our calculators provide informational estimates only. They’re great for general guidance, tracking trends, and preparing for vet visits, but never replace a licensed exotic animal veterinarian’s examination and professional advice. Always consult your vet for medical decisions and any health concerns about your small pet.