Breast Milk Storage Calculator
Enter when you pumped and where you stored it — we'll tell you exactly when it expires.
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GoodBreast Milk Storage Guidelines
Based on CDC guidelines. Always use your judgment — if milk smells off, discard it.
How Long Does Breast Milk Last?
Freshly pumped breast milk can be stored at room temperature for up to 4 hours, in the refrigerator for up to 4 days, and in the freezer for up to 6 months (ideally) or 12 months (acceptable).
The key is to label every bag or bottle with the date and time you pumped, so you always know exactly when it expires. This calculator does that math for you automatically.
If you're building a freezer stash, always use the oldest milk first (FIFO — first in, first out). This ensures nothing goes to waste.
For more pumping tips, read our guide on how to build a breast milk freezer stash or breast milk storage tips for working moms.
Track Your Milk Stash in the App
Our Pumping Tracker app lets you log every session and track your freezer stash — so you always know exactly what you have and when it expires.