Breast Milk Storage Duration Calculator
Find safe storage times for expressed breast milk at room temperature, in the refrigerator, or in the freezer based on CDC guidelines.
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Safe Storage Duration
Breast milk storage guidelines are based on CDC and Academy of Breastfeeding Medicine recommendations.
Freshly expressed breast milk:
| Storage Location | Temperature | Duration |
|---|---|---|
| Room temperature | Up to 77°F (25°C) | Up to 4 hours |
| Insulated cooler with ice packs | 59°F (15°C) | Up to 24 hours |
| Refrigerator | 40°F (4°C) | Up to 4 days (optimal: use within 3 days) |
| Freezer (regular compartment) | 0°F (-18°C) | Up to 6 months (optimal) |
| Deep freezer | -4°F (-20°C) | Up to 12 months (acceptable; 6 months optimal) |
Previously frozen, thawed milk:
- Room temperature: 1–2 hours
- Refrigerator: up to 24 hours
- Do NOT refreeze
Tips:
- Label bags with date and volume
- Store in the back of the fridge/freezer (not the door)
- Thaw oldest milk first
- Swirl gently to mix — do not shake vigorously
Always consult your pediatrician for individual guidance.