Child's Dental Age Calculator
AAPD 2026 · All Ages Birth–17
Enter Child's Age
yrs
mo
🗓️ Dental Development Results
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Primary (Baby) Teeth
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Permanent Teeth (excl. wisdom)
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Baby Teeth Shed
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Total Teeth (approx.)
Recommended Actions
Disclaimer:
Individual tooth eruption and shedding timing varies considerably - ±6 months from average is normal. These figures are based on AAPD 2026 averages. Consult your child's dentist if concerned about delayed development.
Understanding Your Child's Dental Development
Children's dental development follows a broadly predictable sequence across five distinct stages - from the pre-dentition stage before birth through to the full permanent dentition by age 12–13. Understanding which stage your child is in helps you know what to expect, what to watch for, and when dental check-ups are most important.
Use this calculator alongside our Baby Teeth Eruption Chart for a complete visual timeline, and our Pediatric Fluoride Dosage Calculator for age-appropriate fluoride guidance at each stage. For children in the mixed dentition phase (ages 6–12), our Orthodontic Readiness Checker helps identify whether an ortho assessment is timely.
The Five Stages of Children's Dental Development
- Pre-dentition (birth–6 months): No teeth yet. Tooth buds for all 20 primary teeth are already present in the jaw. Clean gums with damp cloth.
- Primary dentition building (6 months–3 years): 20 baby teeth erupt progressively. All 20 present by ~30 months. Cavity risk is highest here - first dental visit by age 1.
- Full primary dentition (3–6 years): All 20 baby teeth present. Relatively stable phase. 6-month check-ups essential. First orthodontic screening at age 7 recommended.
- Mixed dentition (6–12 years): Baby teeth shed as permanent teeth erupt. Most complex phase. First permanent molars erupt without replacing any baby tooth - easy to miss and highly decay-prone.
- Permanent dentition (12+ years): 28 permanent teeth (excluding wisdom) fully erupted. Orthodontic treatment typically occurs here. Wisdom teeth may erupt 17–21.
Frequently Asked Questions
Most children lose their first baby tooth around age 5–6, typically the lower central incisors. This coincides with the eruption of the first permanent teeth - first permanent molars and permanent lower central incisors. If your child has not lost any baby teeth by age 7, mention it at their next dental check-up. Use our Baby Teeth Eruption Chart to see the full shedding sequence.
Yes - the first permanent molars (the "six-year molars") are critically important. They erupt at approximately age 6–7 without replacing any baby tooth, so they are often overlooked. They establish the bite and are essential for chewing. They are also highly decay-prone because they have deep fissures and children may not realize they are permanent. Fissure sealants are strongly recommended for these teeth at eruption.