Breast Milk Storage Time Calculator
How long expressed breast milk stays safe in different conditions.
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Times are general US guidance for healthy full-term babies. Use milk within 1–2 hours of a feed, and do not refreeze thawed milk.
Medical disclaimer: This tool is for education and is not medical advice. Read more.
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Frequently asked questions
What does the Breast Milk Storage Time Calculator do?
How long expressed breast milk stays safe in different conditions. Enter your values and the result and chart update instantly.
How accurate is it?
It uses published, widely used formulas. Results are estimates for education and planning, not a diagnosis. Talk to a qualified clinician about decisions affecting your health.
Is my information stored or shared?
No. All calculations run in your browser and nothing you type is sent to a server or saved.
What can I search to find this tool?
People find it by searching for: how long does breast milk last; breast milk storage times; can i refreeze breastmilk.