How to Tell a Kitten’s Age and Size

Knowing your kitten’s age is important for providing appropriate care. Whether you found a stray or adopted without age information, physical and behavioral clues can help.

kitten’s age affects everything from nutritional needs to socialization requirements.

Newborn to Two Weeks

Newborn kittens weigh between 3 and 5 ounces. Eyes and ears are closed.

Eyes usually open between 7 and 14 days, appearing blue at first.

t two weeks, kittens can crawl but are still wobbly.

Three to Four Weeks

Kittens become more mobile and curious.

Baby teeth begin to emerge.

They start learning social skills from litter mates.

Five to Six Weeks

More coordinated and confident in movements.

dult teeth begin developing beneath baby teeth.

Increasingly independent and receptive to socialization.

Seven to Eight Weeks

ctive, playful, and curious with a full set of baby teeth.

Weigh approximately 1.5 to 2 pounds.

Ideal age for adoption.

Nine to Twelve Weeks

Energetic, playful, and increasingly independent.

Weigh approximately 2 to 3 pounds.

Ready for first vaccinations.

Using Weight and Size to Estimate Age

Newborn kittens weigh 3 to 5 ounces, gaining about 10 to 15 grams per day.

By four weeks, most weigh 6 to 8 ounces.

By eight weeks, they typically weigh 1.5 to 2 pounds.

Weight is generally a more reliable indicator than length.

Behavioral Clues

Newborns sleep almost constantly while older kittens are active and playful.

Younger kittens play with litter mates while older ones explore their environment.

Social behavior provides additional clues about age.

Frequently Asked Questions

How can I tell if my kitten is a newborn?

Closed eyes and ears, weighing 3 to 5 ounces, completely dependent on mother.

When do kittens open their eyes?

Between 7 and 14 days of age.

When do they start eating solid food?

Most begin weaning at around four weeks.

How much should my kitten weigh at 8 weeks?

Approximately 1.5 to 2 pounds.

When should I take my kitten to the vet?

Within the first few weeks, with first vaccinations at six to eight weeks.

Vet Disclaimer

This article is for informational purposes only and does not replace professional veterinary advice. Always consult your veterinarian for guidance on your cat’s specific health needs and before making any changes to their diet or care routine.