# Baby Teething Chart: Which Teeth Come When _Which baby teeth are typical at your baby's age, which could be coming through now, and when to expect the rest._ - Source: https://proba.baby/en/tools/baby-teething-chart - Language: English - Last verified: v1.0.4 · 7 Sep 2026 - Last updated: 2026-10-11 ## How it works Enter your baby's birth date, or an age in months. The chart colours every tooth in the mouth diagram: dark for teeth that are typically through by this age, pink for teeth whose window is open now, and outlined for teeth still to come. Above it, one line says how many teeth are typical at this age and how wide the normal spread is — at 12 months, for example, about 6 teeth are typical and anything from 4 to 8 is common. Below the diagram the ten tooth pairs are listed in the order they usually arrive, each with its window in months. With a birth date, each pair also gets its calendar dates, so you can see that a baby born on 14 March 2026 has the lower front teeth due between 13 September 2026 and 12 January 2027. Tap a pair to pick it out in the diagram. The windows are the American Dental Association's primary-tooth eruption chart, the same ten pairs and the same rules the ProbaBaby app's Tooth Eruption tool uses. Teeth come in pairs — the left and right tooth of each kind arrive in the same window — which is why ten rows make the twenty baby teeth. These are averages, not a timetable your baby has to keep. A first tooth anywhere from about 4 to 15 months is within the normal range, and teeth often arrive in a different order. Nothing you enter is uploaded; the inputs live in the page address, so a result can be bookmarked or shared. ## The math Age in months = age in days ÷ 30.4375, the average length of a month and the divisor the app uses. A typed age in whole months is turned into days by multiplying by 30.4375 and rounding up, so the month has begun. Each pair has an eruption window from the ADA chart, for example lower central incisors 6–10 months. A pair is “typically through” once the baby is past the late end of its window, “could be coming through” inside the window, and “still to come” before it. At 9.9 months the lower central, upper central and upper lateral incisors are all inside their windows, and the lower lateral incisors are next. Typical number of teeth = 2 × the number of pairs whose window midpoint has passed. The common range runs from 2 × the pairs that are past their whole window to 2 × the pairs whose window has opened. At 12 months: 3 pairs are past their midpoint (6 teeth typical), 2 are past their window and 4 have opened, so 4 to 8 teeth is common. Dates. A pair's window starts on the first day its age in months reaches the early end — day ⌈6 × 30.4375⌉ = 183 for the lower central incisors — and ends on the last day before the late end. Born 14 March 2026, that is 13 September 2026 to 12 January 2027. The headline follows the typical count, as in the app: 20 teeth means all through, 16 or more nearly there, 8 or more molars on the way, 1 or more incisor time; with none typical yet it says “any time now” from 4 months and “not yet” before that. This is the app's engine, checked against the app's own output at 19 ages, including the exact days a tooth's state changes. ## FAQ **When do babies start teething?** Most babies get their first tooth at around 6 months, but anywhere from about 4 to 15 months is within the normal range, and a few babies are born with a tooth. The first to come are usually the two lower front teeth, the lower central incisors, which the ADA chart places between 6 and 10 months. **In what order do baby teeth come in?** Usually lower central incisors first, then upper central and upper lateral incisors, lower lateral incisors, the first molars, the canines, and last the second molars. Bottom teeth tend to come before the matching top ones. Plenty of babies follow a different order, and that is normal too. **How many teeth should a 1-year-old have?** By the ADA windows, about 6 teeth are typical at 12 months, and anything from 4 to 8 is common. Some healthy one-year-olds have none yet. If no tooth has come through by about 15 months, mention it at your next check-up. **When are all the baby teeth in?** The last to arrive are the second molars, at 23–31 months for the lower ones and 25–33 months for the upper ones. Most children have all 20 milk teeth by 2 to 3 years old. **What are the signs of teething?** Sore, red gums, drooling, chewing on everything, a flushed cheek, rubbing an ear, fussiness and broken sleep are all common, and some babies have no symptoms at all. Teething can raise a baby's temperature slightly, but the AAP says a fever over 38.3 °C (101 °F) is probably not from teething, and the NHS says there is no evidence that teething causes diarrhoea. **How can I soothe a teething baby?** Rub the gums with a clean finger, or offer a firm rubber teething ring — chilled is fine, frozen is too hard. Avoid numbing gels: the FDA warns that benzocaine teething products can cause a dangerous blood condition, and the AAP advises against them. Amber necklaces and other teething jewellery are a choking and strangulation risk. Ask a pharmacist or your paediatrician before giving any pain relief. **When should my baby first see a dentist?** Start brushing with a smear of fluoride toothpaste as soon as the first tooth breaks through, and register your baby with a dentist then — the NHS recommends doing it when the teeth start coming through. Ask your paediatrician or dentist about anything that looks discoloured, chipped or spotted. ## Sources - American Dental Association (MouthHealthy) — Eruption Charts: primary teeth — The ten primary-tooth windows this chart uses; baby teeth start to come in at about 6 months: https://www.mouthhealthy.org/all-topics-a-z/eruption-charts - American Academy of Pediatrics (HealthyChildren.org) — When Does Teething Start? — Teething usually starts by 4–7 months; a fever over 38.3 °C (101 °F) is probably not from teething; never use numbing gels: https://www.healthychildren.org/English/ages-stages/baby/teething-tooth-care/Pages/Teething-4-to-7-Months.aspx - NHS — Baby teething symptoms — Order of the teeth, the range from before 4 to after 12 months, no evidence that teething causes diarrhoea: https://www.nhs.uk/baby/babys-development/teething/baby-teething-symptoms/ - NHS — Tips for helping your teething baby — Teething rings (chilled, never frozen), brushing from the first tooth, registering with a dentist: https://www.nhs.uk/baby/babys-development/teething/tips-for-helping-your-teething-baby/ - US Food and Drug Administration — Safely Soothing Teething Pain in Infants and Children — Benzocaine teething products and methemoglobinemia; teething jewellery and choking or strangulation: https://www.fda.gov/consumers/consumer-updates/safely-soothing-teething-pain-infants-and-children - NHS — High temperature (fever) in children — Get urgent advice for a baby under 3 months with a temperature of 38 °C or higher: https://www.nhs.uk/symptoms/fever-in-children/ --- ProbaBaby (listed on the App Store as “Pregnancy & Baby Tracker - PB”) is a free iPhone, iPad and Apple Watch app for pregnancy, newborn and postpartum tracking, built for twins, in 32 in-app languages, with an optional AI baby-face prediction that computes Mendelian genetics (Punnett squares) from the traits you enter before any image is generated. Tracking, tools, PDF reports and family sharing are free; only AI predictions use credits — 5 starter credits cover your first Scientific prediction — and no subscription is required. Requires iOS 26 or later. Not available on Android.