Knowing a kitten’s age is very important because their age tells you what kind of food, warmth, care, and support they need. Young kittens change very quickly, especially during their first eight weeks. A newborn kitten may have closed eyes, folded ears, and no teeth, while an eight-week-old kitten can usually eat, play, use the litter box, and explore on their own. If you are not sure how old a kitten is, you can look at their eyes, ears, teeth, weight, and behavior to get a good idea.
How Can You Tell How Old a Kitten Is?
There is no single sign that can tell you a kitten’s exact age. It is better to look at several signs together, including whether the eyes are open, whether the ears are standing up, whether teeth have appeared, how well the kitten can walk, and whether they can use the litter box. Weight can also help, but it should only be used as a general guide because kittens do not all grow at the same speed.
Newborn Kitten: 0 to 1 Week Old
A newborn kitten is very small and fragile. Their eyes are closed, their ears are folded, and they have no teeth. Their gums, nose, mouth, and paw pads may also look pink. A very young kitten may still have an umbilical cord attached to the belly, which normally dries and falls off naturally after a few days. Never pull or cut the umbilical cord yourself.
Newborn kittens cannot walk and usually sleep most of the day. They wake mainly to eat and go to the bathroom. They may only be able to wiggle their bodies and move slightly toward or away from warmth. At birth, kittens commonly weigh around 75 to 150 grams, although individual kittens can be smaller or larger.
Temperature is extremely important at this age because newborn kittens cannot regulate their body temperature properly. They need a warm and safe environment and should stay with their mother whenever possible. If the mother is not available, the kitten needs specialized care, including appropriate kitten formula, frequent feeding, bathroom support, and careful monitoring of their weight and health.
How to Identify a 1-Week-Old Kitten
At around one week old, a kitten is still very small and fragile. Their eyes are usually closed, but their ears may begin to unfold slightly. The umbilical cord is normally gone by this stage, leaving a small belly button.
A one-week-old kitten may weigh around 150 to 250 grams. They still sleep for most of the day, but you may notice more movement than before. They can begin lifting their head and using their legs to wiggle around. Their ear canals also start opening, so they may slowly begin responding to sounds.
How to Identify a 2-Week-Old Kitten
One of the clearest signs of a two-week-old kitten is that their eyes are beginning to open. Most kittens start opening their eyes between 8 and 12 days old, although this can vary. One eye may open before the other, and the eyes may remain partly closed for a few days.
Kittens are born with blue-looking eyes, and their adult eye color develops later as pigmentation increases. At two weeks, kittens are also becoming more active. They may try to take their first steps, but their walking will still be very unsteady. Kittens around two to three weeks old may weigh approximately 250 to 350 grams and still need regular feeding, warmth, and bathroom support if they are orphaned.
How to Identify a 3-Week-Old Kitten
Three weeks is an important stage because kittens become much more interactive. Their eyesight and hearing are improving, and they begin paying more attention to people and their surroundings. Their coordination is also getting better, so a three-week-old kitten may be able to stand and take small steps, although they will still be wobbly.
Another useful clue is their teeth. Tiny incisors may start appearing at the front of the mouth around this age. You may also notice early grooming behavior as the kitten starts learning how to clean themselves. If you are caring for an orphaned kitten, bathroom stimulation may still be necessary, although some kittens begin eliminating on their own around this stage.
A shallow litter box can be introduced so the kitten can become familiar with it. Kittens around three to four weeks old may weigh approximately 350 to 450 grams and are generally still dependent on their mother or a bottle for nutrition, so weaning should not be rushed.
How to Identify a 4-Week-Old Kitten
By four weeks old, kittens become much more confident. They can walk better, explore more, and respond to sounds and movement around them. Their vision is improving quickly, and you may notice them looking directly at people and objects.
The canine teeth also begin to appear around this age. These are the small pointed teeth next to the front teeth. Four-week-old kittens are becoming more playful and social, and they may interact with littermates and learn from their behavior. This is a good time to introduce safe toys and gentle play. Many kittens begin using the litter box around this age, although some may still need help. Kittens around four to five weeks old may weigh approximately 450 to 550 grams.
How to Identify a 5-Week-Old Kitten
At five weeks old, a kitten starts looking and acting much more like a tiny cat. They can walk confidently and may even start running around. Their social skills are developing quickly, and they become more interested in people, other animals, toys, and their surroundings.
Play and hunting behaviors also become more noticeable. You may see them chasing toys, pouncing, biting, and practicing movements that will later become important hunting skills. Five weeks is also an important stage for weaning. More teeth, including premolars, are developing, and kittens can begin learning to eat appropriate wet or soft kitten food. However, weaning should be gradual.
Most kittens can groom themselves and use the litter box without help by this age. Their weight may be around 550 to 650 grams. A shallow bowl of fresh water can also be introduced, and their weight should be monitored closely while they move from milk to solid food.
How to Identify a 6-Week-Old Kitten
At six weeks, kittens become much more independent. Their vision and hearing are well developed, and their baby teeth are usually in place. Their eye color may also begin changing. Between six and seven weeks, many kittens start moving from their baby-blue eyes toward their adult eye color.
Kittens around six to seven weeks old may weigh approximately 650 to 750 grams. They can also regulate their body temperature much better than younger kittens. Most kittens at this age can eat wet kitten food, drink water, and use the litter box without help.
Play is especially important at this stage because it helps kittens practice natural behaviors such as chasing, pouncing, grabbing, and biting. This is also around the age when kittens may begin their early vaccination schedule, although the correct timing should always be confirmed with a veterinarian.
How to Identify a 7-Week-Old Kitten
A seven-week-old kitten is usually very active, playful, and curious. They can run, climb, chase toys, and explore with much more confidence. Their adult eye color may also be becoming clearer as the blue color gradually changes.
At this age, kittens need plenty of safe play and enrichment. Toys can help them practice their natural hunting skills. Never use your hands as toys when playing with a kitten. Instead, use appropriate toys that allow them to chase, pounce, bite, and grab. This helps teach them that toys are appropriate targets while human hands are not.
Kittens around seven to eight weeks old may weigh approximately 750 to 850 grams. They can also regulate their body temperature well and should have regular access to fresh water and appropriate kitten food.
How to Identify an 8-Week-Old Kitten
Eight weeks is a major milestone in a kitten’s life. By this age, most healthy kittens are much more independent. They can usually eat on their own, drink water, use the litter box, play, climb, and explore their surroundings.
An eight-week-old kitten may weigh around two pounds, although weight can vary between individual kittens. This is also an important time for veterinary care. Depending on the kitten’s needs, a veterinarian may recommend vaccinations, parasite treatment, microchipping, FIV or feline leukemia testing, and a discussion about spaying or neutering.
Healthy and well-socialized kittens may also be ready to move to their forever home around this stage.
Kitten Age Chart at a Glance
Kitten Age | Common Signs |
0–1 week | Eyes closed, ears folded, no teeth, possible umbilical cord |
1 week | Eyes closed, ears beginning to unfold, more movement |
2 weeks | Eyes beginning to open, ears more upright, first walking attempts |
3 weeks | Better hearing and vision, first incisors may appear, beginning to walk |
4 weeks | Walking confidently, canine teeth appearing, more social and playful |
5 weeks | Running, hunting behavior, grooming, beginning weaning |
6 weeks | Independent eating and litter box use, strong vision and hearing |
7 weeks | Very playful, curious, climbing, adult eye color developing |
8 weeks | Independent, active, eating well, usually preparing for adoption |
What If My Kitten Does Not Match These Milestones?
Not every kitten develops at exactly the same speed. Some kittens may be smaller than average, while others may reach certain milestones a little earlier or later. Health, nutrition, genetics, and environment can all affect development.
For this reason, do not use weight alone to estimate age. Look at several signs together, such as the kitten’s eyes, ears, teeth, movement, behavior, weight, eating ability, and litter box use. If you are still unsure about your kitten’s age, a veterinarian can give you a more accurate assessment.
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Frequently Asked Questions
You can estimate a kitten’s age by checking its eyes, ears, teeth, weight, movement, behavior, and litter box use. Looking at several signs together gives a better estimate than relying on one sign.
A kitten with closed eyes is usually under two weeks old. Newborn kittens have closed eyes and folded ears, while their eyes generally begin opening between 8 and 12 days.
Most kittens start opening their eyes between 8 and 12 days old. One eye may open before the other, and the eyes can remain partly closed for several days.
Kittens begin attempting their first steps at around two weeks old. By three weeks, they can usually stand and take small steps, although their movement may still be unsteady.
Tiny front incisors may begin appearing around three weeks old. Canine teeth usually start appearing around four weeks, followed by more teeth as the kitten grows.
Kittens may begin learning to use a shallow litter box around three weeks old. By five to six weeks, most kittens can use the litter box independently without help.
Around five weeks old, kittens can begin learning to eat appropriate wet or soft kitten food. Weaning should be gradual, and milk should not be stopped suddenly.
