How Long Is Breast Milk Good For
without the guesswork.
Breast Milk Storage Duration Calculator — Start the correct CDC clock at expression, thawing, warming, feeding or cooler storage and let infant context or storage uncertainty override it. Includes a practical guide and embedded calculator. Sensitive inputs stay in your browser.
The clock starts from the selected milk state: expression, complete thawing, warming, the end of feeding or cooler storage. Changing state starts a different CDC limit.
Context matters.
- The CDC table is for healthy, full-term babies. Premature, hospitalized or medically fragile infants may need stricter clinical instructions.
- Never microwave breast milk. Once completely thawed, do not refreeze it; milk that still contains ice crystals after a power outage may be refrozen.
- When combining cooled milk from different expression times, base the storage duration on the oldest milk. When the milk changes state, record the new start time.
Sources & scope
This page shows the source trail, jurisdiction and review date alongside the result. Always confirm time-sensitive rules with the linked authority.
What to know before using the result.
When does the breast-milk storage clock begin?
Use the earliest relevant event: expression for fresh milk, complete thawing for thawed milk, or warming/feeding for milk that has been offered. The most restrictive active clock controls.
Why does frozen milk show both six and twelve months?
CDC describes about six months as best quality and up to twelve months as acceptable in a freezer at 0°F / -18°C or colder. Storage conditions and the infant's care plan still matter.
Do the standard limits apply to a premature or hospitalized infant?
Not necessarily. Hospitals and clinical teams may use stricter handling rules for premature, sick or immunocompromised infants, so their instructions override this household reference.