Pets & Animals calculators
Dogs and cats mature quickly in their first years and more slowly afterwards, so the old seven-to-one rule is a poor guide. These calculators use published growth and gestation figures to estimate a pet's age in human terms or the date a litter is due.
Animals vary by breed, size, and health, so treat each result as a starting point and ask your veterinarian about your own animal.
See all 100 dances →
- Cat Age CalculatorFind out roughly how old your cat is in human years, and which stage of life your cat is in.
- Dog Age CalculatorFind out roughly how old your dog is in human years, using a chart based on size or a formula from DNA research.
- Dog Food Amount CalculatorFind out how many cups of dry food or cans of wet food your dog needs a day, based on its weight, age and the food label.
- Dog Pregnancy CalculatorFind out when your dog's puppies are due from the breeding date, with the usual 58–68 day window and how far along she is.
- Animal Gestation CalculatorEstimate the due date for a cow, horse, goat, sheep, pig, rabbit, guinea pig or cat from the breeding date, with the usual range.
- Aquarium Volume CalculatorFind how many gallons or liters of water a rectangular, cylinder, bow-front or hexagonal fish tank holds, and how much that water weighs.
- Pet Calorie Needs CalculatorEstimate how many calories a dog or cat needs each day from its weight and life stage. It uses the resting energy requirement and AAHA life stage factors.
- Puppy Weight CalculatorGet a rough idea of how big your puppy will grow, from its weight today, its age in weeks and its expected adult size. You also get a likely range.