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Baby Teeth Eruption Timeline: When Do They Come In?

Enter your baby's age in months and instantly see which of the 20 primary teeth should have erupted, how many to expect, and which are coming next. Full eruption chart from 6 to 33 months.

🗓️ Updated June 2026 Reviewed by Martín Rodríguez

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Reviewed by: Martín Rodríguez (editorial policy ) · Last reviewed: Jun 12, 2026

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Every parent has been there — your baby is drooling, fussing, chewing everything in sight, and you're wondering: is this a tooth coming in?

Human babies develop 20 primary teeth (also called baby teeth or deciduous teeth). The first tooth — usually a lower central incisor — typically appears between 6 and 10 months. From there, new teeth arrive in a predictable sequence, wrapping up around 30 to 33 months with the second molars.

Enter your baby's age in months to get a personalized eruption timeline: which teeth have likely erupted, which are next, and how many to expect right now.

When to use this calculator

Is my baby teething? — Your baby is drooling heavily and gnawing on toys. Enter their age to see if teeth are expected now and which symptoms to watch for — drooling and irritability often start 4-8 weeks before a tooth breaks through.
No teeth at 12 months — Most babies have 2-4 teeth by 10 months, but the normal range extends to 13-14 months for the first tooth. If no tooth by 15 months, the AAPD recommends consulting a pediatric dentist.
Preparing for the 12-month dental visit — The AAPD and AAP recommend a child's first dental visit by age 1 or within 6 months of the first tooth — whichever comes first. Track which teeth have erupted so you can inform the dentist.
Canine teething wave at 16-23 months — Canines are notorious for causing more pain than incisors due to their pointed shape. The first and second molars (13-33 months) cause the most discomfort of all. Knowing what's coming helps you prepare.

When each primary tooth falls out (shedding / exfoliation age)

Baby teeth fall out in roughly the same order they came in. Lower teeth usually shed before their upper counterparts.

Primary tooth	Erupts (months)	Falls out (years)	Replaced by
Lower central incisors	6–10	6–7	Permanent central incisors
Upper central incisors	8–12	6–7	Permanent central incisors
Lower & upper lateral incisors	9–16	7–8	Permanent lateral incisors
First molars	13–19	9–11	First premolars (bicuspids)
Canines (cuspids)	16–23	9–12	Permanent canines
Second molars	23–33	10–12	Second premolars (bicuspids)

Shedding ages per AAPD/ADA exfoliation charts. The 20 primary teeth are gradually replaced by 32 permanent teeth (including 4 third molars/wisdom teeth that erupt at 17–25 years). A primary tooth lost much earlier than these ages — usually to decay or injury — may need a space maintainer.

How it works

Baby Teeth Eruption Chart by Age

Tooth	Eruption window (months)	Running total
Lower central incisors	6-10	2
Upper central incisors	8-12	4
Upper lateral incisors	9-13	6
Lower lateral incisors	10-16	8
Upper first molars	13-19	10
Lower first molars	14-18	12
Upper canines (cuspids)	16-22	14
Lower canines (cuspids)	17-23	16
Lower second molars	23-31	18
Upper second molars	25-33	20

Total: 20 primary teeth (10 upper + 10 lower). Lower teeth typically erupt slightly before their upper counterparts.

How many teeth should my baby have? (Quick reference)

Age	Typical teeth count
6 months	0-2
9 months	2-4
12 months	4-8
18 months	8-12
24 months	14-18
30-33 months	20 (complete)

Quick rule of thumb: Number of teeth ≈ age in months − 6 (valid roughly 6 to 26 months).

Common teething symptoms

Excessive drooling (often starts 4-8 weeks before the tooth breaks through)

Swollen, red or tender gums

Increased irritability and chewing on objects

Sleep disruption around eruption

Mild temperature elevation (< 38°C / 100.4°F) — high fever is NOT caused by teething

When to start dental care

Before first tooth: wipe gums with a damp cloth after feeds.

First tooth through age 3: soft infant toothbrush with a rice-grain-sized smear of fluoride toothpaste, twice daily.

Ages 3-6: increase to a pea-sized amount of fluoride toothpaste, supervised spitting.

First dental visit: by the first birthday or within 6 months of the first tooth (AAPD recommendation).

When to consult a pediatric dentist

No teeth by 15 months (rule out hypodontia)

Teeth erupting severely out of sequence or asymmetrically

Tooth with abnormal color (gray or brown)

Early childhood caries (cavities don't self-resolve in baby teeth)

Editorial review

Reviewed by the Hacé Cuentas editorial team, cross-referenced against AAPD and AAP published guidelines.

Disclaimer: This tool is informational. For any concern about your child's dental or general development, consult your pediatrician or a board-certified pediatric dentist.

Example: 10-month-old baby

Age: 10 months.

Expected teeth: 4 central incisors (2 lower + 2 upper) + 2 upper lateral incisors = 6 teeth.

Quick rule: 10 − 6 = ~4 teeth minimum.

Next: Lower lateral incisors (~12 m), first molars (~14-19 m).

At 10 months, your baby should have between 4 and 6 teeth: the 4 central incisors and possibly the upper lateral incisors. Next: lower lateral incisors.

Frequently asked questions

When does the first baby tooth come in?

The first baby tooth usually appears between 6 and 10 months — almost always one of the lower central incisors (bottom front teeth). Some babies get their first tooth as early as 4 months; others not until 12-13 months. Both are normal. If no tooth has appeared by 15 months, the AAPD recommends consulting a pediatric dentist.

How many teeth should my baby have at each age?

Quick guide: 6 months = 0-2 teeth; 9 months = 2-4; 12 months = 4-8; 18 months = 8-12; 24 months = 14-18; 30-33 months = all 20. Rule of thumb: teeth ≈ age in months − 6 (between 6 and 26 months). These are averages — wide variation is normal.

Is it normal if my baby has no teeth at 12 months?

Yes. The first tooth normally erupts between 6 and 12 months, so some babies reach their first birthday with no teeth — especially if parents were late teethers. If no teeth by 13-15 months, a pediatric dentist visit is a smart precaution. An X-ray can confirm tooth buds are present and developing normally.

Can teething cause a fever?

Teething does NOT cause high fevers. It may cause a very mild temperature elevation (up to ~99-100°F / 37.2-37.8°C) from localized gum inflammation. But a fever of 100.4°F (38°C) or higher is not caused by teething and should be evaluated by your child's doctor. Don't blame fever on teething — real illnesses (ear infections, viruses) can go untreated if you do.

What can I give my baby for teething pain?

Safe options: cold (not frozen) teething rings, gentle gum massage with a clean finger, and acetaminophen or ibuprofen (6+ months) dosed by weight per your pediatrician. Avoid: benzocaine gels (FDA warns against use in children under 2), homeopathic teething tablets with belladonna, and amber teething necklaces (choking/strangulation hazard with no proven benefit).

When do baby teeth fall out?

Primary teeth begin to shed around age 5 to 7, usually starting with the lower central incisors — the same teeth that erupted first. The process is typically complete by ages 12 to 13. If a baby tooth is lost early due to decay or injury, a space maintainer may be recommended to prevent neighboring teeth from drifting.

Does my baby need a dental visit before age 1?

Yes. Both the AAPD and the AAP recommend a child's first dental visit by their first birthday, or within 6 months of the first tooth erupting — whichever comes first. This early visit checks eruption progress, applies fluoride varnish, and coaches parents on brushing technique and feeding habits.

What is the full order of baby teeth eruption?

1. Lower central incisors (6-10 m) → 2. Upper central incisors (8-12 m) → 3. Upper lateral incisors (9-13 m) → 4. Lower lateral incisors (10-16 m) → 5. First molars (13-19 m) → 6. Canines (16-23 m) → 7. Second molars (23-33 m). Total: 20 teeth. Lower teeth usually erupt slightly before upper ones.

Why do some teeth cause more pain than others?

Central and lateral incisors cause relatively mild discomfort — they're flat-edged. Canines (16-23 months) are notoriously painful; their pointed shape requires more force to break through. First and second molars (13-33 months) cover the most gum surface area and typically cause the most discomfort — expect more sleep disruption during these waves.

Is it normal if teeth come in a different order?

Completely normal. The eruption timeline is statistical — individual variation is common. Some babies get upper incisors before lower ones; others get two teeth simultaneously. Consult a pediatric dentist only if: no teeth by 15 months, marked asymmetry (only one side erupting), or a tooth with abnormal color (gray or brown).

Does breastfeeding affect my baby's teeth?

Breastfeeding supports healthy jaw and palate development. However, breast milk — like formula — contains lactose that can cause decay if teeth are in prolonged contact with it (baby falling asleep nursing). After the last nighttime feeding, wipe your baby's gums/teeth with a damp cloth. The WHO recommends breastfeeding up to age 2 or beyond — it's compatible with healthy teeth if oral hygiene is maintained.

Should I be worried if teeth come in crooked?

Not immediately. Baby teeth often erupt slightly crooked and self-correct as surrounding teeth emerge. Small gaps between baby teeth are actually a good sign — they make room for larger permanent teeth. If teeth are severely misaligned, or your child has prolonged thumb-sucking or pacifier use past age 3, mention it to your pediatric dentist.

Sources & references

Methodology & trust

Editorial

Calculadora de salud revisada por el equipo editorial de Hacé Cuentas, contrastada con AAPD — Eruption Charts for Primary and Permanent Teeth, según nuestra política editorial y metodología.

Updates

Última revisión: June 12, 2026. Los parámetros se verifican periódicamente con las fuentes citadas.

Privacy

Calculations run 100% in your browser. We do not store or transmit your data.

Limitations

Indicative results. For critical decisions, consult a professional.

📌 How to cite this calculator

Rodríguez, M. (2026). Baby Teeth Eruption Timeline: When Do They Come In?. Hacé Cuentas. https://hacecuentas.com/baby-teeth-eruption-timeline

Contenido bajo licencia CC-BY 4.0 — reutilizable citando la fuente con enlace a Hacé Cuentas.

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