{"id":23157,"date":"2026-08-02T02:20:13","date_gmt":"2026-08-02T02:20:13","guid":{"rendered":"https:\/\/www.youragecalculator.com\/blog\/?p=23157"},"modified":"2026-08-02T02:20:13","modified_gmt":"2026-08-02T02:20:13","slug":"vaccine-age-calculator-childhood-vaccination-schedule","status":"publish","type":"post","link":"https:\/\/www.youragecalculator.com\/blog\/vaccine-age-calculator-childhood-vaccination-schedule\/","title":{"rendered":"Vaccine Age Calculator: What Vaccinations Your Child Needs at Every Age"},"content":{"rendered":"\n

Few things cause more parental confusion than the childhood vaccination schedule. Between the 2-month, 4-month, 6-month, 12-month, and 18-month visits \u2014 not to mention the 4-to-6-year booster round \u2014 it is easy to lose track of which shot your child should be getting and when. The schedule exists because vaccines are tested to be given at specific ages when the immune system responds best and when the risk of the disease is highest. Missing a window usually means catch-up doses, and in some states it can delay school enrollment.<\/p>\n\n\n\n

The good news is that the schedule is built around your child’s exact age, so the first step is simply knowing precisely how old your child is in months and weeks. You can calculate your child’s exact age with our Vaccine Age Calculator<\/a> to see which milestone window they are in \u2014 then match it against the official schedule below.<\/p>\n\n\n\n

The Standard US Childhood Vaccine Schedule<\/h2>\n\n\n\n

The CDC’s recommended schedule groups vaccines into age windows. Here is the core timeline most pediatricians follow:<\/p>\n\n\n\n

\n
Age<\/th>Vaccines Typically Given<\/th>Notes<\/th><\/tr><\/thead>
Birth<\/td>Hepatitis B (1st dose)<\/td>Given before hospital discharge<\/td><\/tr>\n
1-2 months<\/td>Hepatitis B (2nd dose)<\/td>If not given at 1 month, given at 2-month visit<\/td><\/tr>\n
2 months<\/td>DTaP, IPV, Hib, PCV13, Rotavirus<\/td>First big combination visit<\/td><\/tr>\n
4 months<\/td>DTaP, IPV, Hib, PCV13, Rotavirus (2nd doses)<\/td>Same set as 2 months<\/td><\/tr>\n
6 months<\/td>DTaP, IPV, Hib, PCV13, Rotavirus (3rd doses); HepB (3rd); annual flu starting here<\/td>Flu vaccine can begin at 6 months<\/td><\/tr>\n
12-15 months<\/td>MMR, Varicella, Hib (booster), PCV13 (booster), HepA<\/td>Big milestone visit<\/td><\/tr>\n
18 months<\/td>DTaP (4th dose), HepA (2nd dose)<\/td>Also a developmental checkup<\/td><\/tr>\n
4-6 years<\/td>DTaP (5th dose), IPV (4th), MMR (2nd), Varicella (2nd)<\/td>Required before kindergarten in most states<\/td><\/tr>\n
11-12 years<\/td>Tdap, HPV series, MenACWY<\/td>Pre-teen visit<\/td><\/tr>\n
16 years<\/td>MenB (optional), MenACWY booster<\/td>College-prep booster<\/td><\/tr>\n<\/tbody><\/table><\/figure>\n\n\n\n

Vaccines can be given at any point within each window \u2014 a 13-month-old who missed the 12-month visit does not need to start over; they simply get the due shots at the next appointment. Use a vaccine age calculator<\/a> to confirm exactly which window your child falls into before calling the pediatrician.<\/p>\n\n\n\n

Why Age Windows Matter<\/h2>\n\n\n\n

Vaccines are not given “whenever” for administrative convenience. There are three concrete reasons:<\/p>\n\n\n\n