Pet Health Calculators for Dogs & Cats
Use these free pet health calculators for dogs and cats to quickly estimate age in human years, daily calorie needs, and basic vaccine & deworming guidance. All tools are created and reviewed by Dr. Zahid Afzal (DVM) for educational use at home.
Dog & Cat Age to Human Years Calculator
This interactive dog age calculator and cat age calculator helps you estimate your pet’s age in human years. It’s a quick way to think in “life stages” (puppy, adult, senior) when planning health checks, blood tests, and screening with your vet.
Dog & Cat Age to Human Years Calculator
Enter your pet’s age and species to see the approximate human-age equivalent. Use this as a simple reference, not a replacement for veterinary examination.
This pet age calculator uses a common veterinary formula: first year ≈ 15 human years, second year ≈ 9 human years, then dogs add ≈ 5 years and cats add ≈ 4 years per calendar year.
| Pet age (years) | Dog → human years | Cat → human years |
|---|---|---|
| 0.5 | ≈ 8 | ≈ 8 |
| 1 | ≈ 15 | ≈ 15 |
| 2 | ≈ 24 | ≈ 24 |
| 3 | ≈ 29 | ≈ 28 |
| 4 | ≈ 34 | ≈ 32 |
| 5 | ≈ 39 | ≈ 36 |
| 6 | ≈ 44 | ≈ 40 |
| 7 | ≈ 49 | ≈ 44 |
| 8 | ≈ 54 | ≈ 48 |
| 9 | ≈ 59 | ≈ 52 |
| 10 | ≈ 64 | ≈ 56 |
| 12 | ≈ 74 | ≈ 64 |
| 14 | ≈ 84 | ≈ 72 |
| 16 | ≈ 94 | ≈ 80 |
Reminder: Always base serious health decisions (blood tests, anaesthesia, surgery) on a full vet exam, not on any dog or cat age calculator alone.
Dog & Cat Feeding / Calories Calculator
This tool works as a basic dog calorie calculator and cat feeding calculator. It uses standard Resting Energy Requirement (RER) formulas and activity factors to estimate your pet’s daily calorie needs. Always adjust based on body condition score and your veterinarian’s advice.
Dog & Cat Feeding / Calories Calculator
Enter your pet’s weight and lifestyle to estimate a safe starting point for daily calories. This is for healthy adult pets only.
Values are based on RER (Resting Energy Requirement) = 70 × (body weight in kg)0.75 multiplied by an activity factor. This pet health calculator gives a starting point; always fine-tune food amounts with your vet.
| Species | Weight | Lifestyle | Approx. kcal / day |
|---|---|---|---|
| Dog | 5 kg | Indoor / low | ≈ 260 kcal |
| Dog | 10 kg | Adult – normal | ≈ 575 kcal |
| Dog | 20 kg | Very active | ≈ 1,420 kcal |
| Cat | 3 kg | Indoor / low | ≈ 130 kcal |
| Cat | 4 kg | Adult – normal | ≈ 200 kcal |
| Cat | 4 kg | Very active | ≈ 230 kcal |
Tip: Start near the suggested calories, then adjust every 2–3 weeks based on body shape, weight changes and your vet’s body-condition scoring.
Dog & Cat Vaccine & Deworming Schedule Helper
This tool gives a simple, educational dog vaccine schedule and cat vaccination schedule based on age. Exact timings always depend on your local disease risk and your veterinarian’s protocol, so treat this as a reminder, not a final plan.
Dog & Cat Vaccine / Deworming Schedule Helper
Enter species and age in months to see a general reminder for core vaccines and deworming. Always follow the official schedule your clinic provides.