Pets & Animals
Free pet calculators: dog age and cat age in human years, daily dog food portions and a puppy adult-weight estimator — with the methods explained.
📌 About Pets & Animals
How old is your dog or cat in human years, how much should you feed them, and how big will that puppy get? These pet calculators turn an age or a bodyweight into a clear answer using the methods owners and breeders actually use — the AKC size-adjusted aging method for dogs, the standard feline curve for cats, and the resting-energy formula (RER = 70 × kg^0.75) for daily food.
Each tool shows the formula and a worked example, and is meant as general guidance, not veterinary advice — your vet sets the real feeding amount and tracks your pet’s health. Use them to satisfy your curiosity, plan a feeding routine, or estimate how much your growing puppy still has to go.
- Convert a dog’s age to human years, adjusted for small, medium or large breeds
- Convert a cat’s age to human years
- Estimate daily dog food in cups from bodyweight and activity level
- Project a puppy’s adult weight from its current age and weight
- See the method (AKC aging, RER energy formula) behind every result
- Quick, free, and easy to use on your phone at the vet or pet store
🧮 Calculators in this category
Pet Age
Pet Care
❓ Frequently asked questions
How do you calculate a dog’s age in human years?
The AKC method counts the first year as about 15 human years, the second year as 9 more (24 total), then 4–6 human years per year after that depending on the dog’s size — larger breeds age faster. A 5-year-old medium dog is roughly 39 in human years.
Is one dog year really seven human years?
No — the “multiply by 7” rule is a myth. Dogs mature very fast in their first two years and then more slowly, and large breeds age faster than small ones, which the size-adjusted method captures.
How much food should I feed my dog?
Start from resting energy (RER = 70 × weight in kg^0.75), multiply by an activity factor (about 1.6 for a neutered adult), then divide by the calories per cup on your food’s label. The dog food calculator does this — confirm the amount with your vet.
Are these pet calculators a substitute for a veterinarian?
No. They are informational estimates based on standard formulas. Use them as a starting point, but rely on your veterinarian for feeding amounts, weight targets and any health concern.