About this calculator
This baby teeth eruption calculator turns a standard tooth eruption chart into a personalized timeline. Enter your child's age and the number of visible baby teeth to see which primary teeth are usually expected, which may be erupting now, and which teeth commonly come next.
Tooth eruption varies from child to child. This tool is for parent education and dental visit preparation, not diagnosis.
Uses American Dental Association primary tooth eruption ranges and AAPD dental growth and development ranges to compare a child's age with typical primary tooth eruption windows. Tooth eruption varies; this is a timeline guide, not a diagnosis.
Formula active with dental timeline guardrails
Educational estimate only; not a diagnosis, prescription, or treatment plan.
Formula and method
The calculator compares the child's age in months with published primary tooth eruption windows. Teeth whose eruption window has ended are counted as typically present by now, teeth whose window includes the child's current age are labeled as commonly erupting now, and later windows are listed as upcoming. The visible tooth count is compared with a typical low-to-high range for the child's age.
Limitations and when not to rely on this result
- Educational estimate only; not a diagnosis, prescription, or treatment plan.
- Result depends on accurate inputs and may not apply to complex medical situations.
- Use clinician judgment, local guidance, and urgent care pathways when symptoms are severe.
Frequently asked questions
When do baby teeth usually start coming in? +
The ADA notes that primary teeth usually start to erupt at about 6 months of age, although timing varies. The lower central incisors are often among the first teeth.
How many baby teeth should a child have? +
Children usually have 20 primary teeth when the baby teeth are complete. The ADA eruption chart lists the second molars as typically erupting by the late toddler years.
Is late teething always a problem? +
No. Eruption timing varies and AAPD notes that many otherwise normal infants do not follow the stated schedule strictly. Delays are a reason to ask a dentist, not a diagnosis by themselves.
When should my child first see a dentist? +
AAPD parent guidance says a child should see a pediatric dentist when the first tooth appears or no later than the first birthday.
Can teething cause high fever or severe illness? +
This calculator does not diagnose symptoms. Seek medical or dental care for high fever, severe pain, swelling, pus, injury, dehydration, or if your child looks very unwell.