Baby Food Introduction Schedule Calculator
Use CDC's one-food 3–5 day reference only after readiness, high-risk peanut and reaction gates are checked. Sensitive inputs stay in your browser.
CDC advises one single-ingredient food at a time initially and a 3–5 day interval before another new food, while introducing allergenic foods alongside other complementary foods rather than delaying them by default.
Context matters.
- Trouble breathing, severe swelling, collapse, blue or pale color, or a rapidly worsening reaction needs emergency help; follow the child's emergency allergy plan if one exists.
- Hives, repeated vomiting, cough, facial swelling or another possible reaction needs prompt clinician guidance before the food is offered again.
- For severe eczema or egg allergy, discuss peanut introduction with the child's clinician. A three-to-five-day interval is not a home challenge protocol.
Sources & scope
The calculation guide and this source trail show what the result means, where the rule came from and when it was last reviewed. This is source-and-calculation QA, not a claim of medical, legal, tax or other professional review; time-sensitive decisions still belong with the linked authority.
A visible path from input to answer.
Use CDC's one-food 3–5 day reference only after readiness, high-risk peanut and reaction gates are checked. The page keeps the calculation scope and its limits beside the result so the output can be checked, copied or revisited.
- Read the record. The calculator uses New food, First introduction date, Check date, Child age (months) and Complementary-food readiness and 2 additional fields supplied in the form.
- Apply the scope. It applies the United States complementary-food introduction — CDC readiness, 3–5 day single-food reference and high-risk peanut gate reference and the explicit date, unit and counting conventions shown in the result.
- Expose the checkpoints. Intermediate rows, warnings and timeline events stay visible; the emphasized row identifies the primary checkpoint when one exists.
CDC advises one single-ingredient food at a time initially and a 3–5 day interval before another new food, while introducing allergenic foods alongside other complementary foods rather than delaying them by default.
- CDC next-new-food referenceSep 2, 2026 – Sep 4, 2026
- Calendar conclusionObservation period in progress
Calculation purpose: Use CDC's one-food 3–5 day reference only after readiness, high-risk peanut and reaction gates are checked. This is a high-sensitivity reference output; the linked authority or qualified professional controls the final decision.
Calendar inputs use plain year-month-day semantics. Leap days, month ends, date-pair order and unsupported dates are checked before the result is shown.
Rule set 2.0.0 · Last reviewed 2026-08-20 · Next review due 2027-02-20. The source panel below contains the linked evidence.
What to know before using the result.
Why does the calculator show a three-to-five-day observation window?
CDC advises introducing one single-ingredient food at a time and waiting three to five days before another new food so a possible reaction is easier to identify.
Should common allergenic foods be delayed?
CDC says potentially allergenic foods can be introduced with other foods when the baby is developmentally ready. A clinician may give a different plan for a high-risk infant.
What if a baby has severe eczema or an egg allergy?
Early peanut introduction may need clinician-guided testing and timing. Do not use a generic wait-period calculator to replace that individualized plan or to assess a reaction.