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How to Tell a Kitten's Age

Read the milestones: closed eyes means under ~2 weeks, wobbly walking around 3 weeks, teeth and confident play point to 3-6 weeks and beyondFact

You can estimate age from stacked physical markers. Eyes closed and ears folded means a newborn; eyes and ears open around 2 weeks; first wobbly walking near 3 weeks; baby teeth coming in at about 3 weeks; running and pouncing by 5 weeks. The ASPCA also notes middle incisors appear around 12 weeks.

Applies to: Any kitten of unknown age from birth through the early weeks, especially strays or orphans.

Steps

Eyes and ears firstFact
  • Eyes closed and ears folded flat means under about 2 weeks
  • Eyes beginning to open points to roughly 8-14 days
  • Eyes and ears both open suggests around 2 weeks
  • Ears pointing upright suggests about 3 weeks
Movement and play markersFact
  • First wobbly attempts to walk appear near 2-3 weeks
  • Most kittens are walking around 3 weeks, still gaining coordination
  • Interacting, walking, running and playing points to about 4 weeks
  • Running, avoiding obstacles and pouncing suggests around 5 weeks
Teeth are the most precise clueFact
  • Baby teeth start coming in around 3 weeks of age
  • The first permanent middle incisors appear at about 12 weeks
  • Teeth give a tighter estimate than size or weight alone
  • Combine several markers rather than relying on one

Normal vs keep-watching

Normal: An estimate that lands within a week or so; markers may not line up perfectly because kittens develop at slightly different rates.

Keep watching: Note eyes/ears, walking ability, and whether teeth are erupting, then match the cluster to the nearest stage.

When to contact a vet. If a young kitten seems orphaned or unwell, or you cannot confidently estimate age to guide feeding, contact a vet or a local rescue, since feeding schedule and warmth depend on getting age roughly right.

What changes this answer

  • Underweight or premature kittens can look younger than their true age
  • Missing or unreliable birth date
  • Poor body condition from neglect can blur size-based estimates

Common mistakes

  • Guessing age from size or weight alone
  • Relying on a single marker instead of the full cluster
  • Assuming a small kitten is younger when it may just be underfed

Sources

Real questions cat owners ask

  • How can I tell if a kitten is 4 weeks or 8 weeks old?
  • Can I estimate a kitten's age from its teeth?
  • What is the youngest age a kitten can safely leave its mother?
Log your best age estimate and the markers you used, so it can be refined as the kitten develops. Set up your Cat Passport.

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