Breast milk lasts 4 hours in the pantry, 4 days in the fridge, and 6–12 months in the freezer. Thawed, it keeps 1–2 hours in the pantry or 1 day in the fridge.
Shelf life at a glance
Bars show the longest recommended time for each place. Scale runs from 1 hour to 2 years.
- 1Use within days
- 2Keeps a week or two
- 3Keeps for months
- 4Keeps a long time
Based on the longest fridge or pantry time.
About 2 more days in the fridge.
About 1 more days in the fridge.
It's inside the safe window but near the end. Eat it today or freeze it now.
Past the recommended fridge time. Even if it looks and smells fine, throw it out.
Past the recommended fridge time. Even if it looks and smells fine, throw it out.
Counted from the day it was cooked, opened or bought. Assumes a fridge at 4 °C (40 °F) or colder.
Your breast milk fridge countdown
- Made0
- Day1
- Day2
- Day3
- Day4
- Day5
- Day6
Based on the USDA FoodKeeper fridge window at 4°C (40°F) or colder.
Breast milk storage times by method
| Method | Duration | Temperature | Container | Notes |
|---|---|---|---|---|
| Pantry / counter (freshly expressed) | 4 hours | 68–72°F | Airtight | 77°F (25°C) or colder |
| Refrigerator (freshly expressed) | 4 days | ≤ 40°F / 4°C | Airtight | at 40°F (4°C) |
| Freezer (freshly expressed) | 6–12 months | 0°F / -18°C | Freezer bag or wrap | 6 months best, 12 acceptable |
| Pantry / counter (thawed) | 1–2 hours | 68–72°F | Airtight | cool, dry place |
| Refrigerator (thawed) | 1 day | ≤ 40°F / 4°C | Airtight | at or below 40°F (4°C) |
Where to store breast milk
Ready-to-eat and cooked food goes on the upper shelves, above anything raw.
Breast milk shelf life, answered
How long does breast milk last in the fridge?
4 days at 4°C (40°F) or colder (freshly expressed). Count from the day it was cooked, opened or bought.
How long does breast milk last in the freezer?
6–12 months for best quality at -18°C (0°F). Frozen food stays safe indefinitely; after that, texture and flavour fade.
How long does breast milk last at room temperature?
No more than 2 hours, or 1 hour above 32°C (90°F). Perishable food left out longer should be thrown away.
How long does thawed breast milk last?
1–2 hours in the pantry or 1 day in the fridge.
How long is breast milk good for past the expiration date?
For perishable breast milk, the storage clock matters more than the label: if it has been in the fridge longer than 4 days, discard it even before the printed date.
How can you tell if breast milk is bad?
Sour or off smell in prepared formula or food. Separation that does not mix back, or clumps. Change from the usual colour.
How long can breast milk sit out?
2 hours at room temperature, 1 hour on a hot day above 32°C (90°F). Overnight is always too long.
Signs breast milk has gone bad
Smell
Sour or off smell in prepared formula or food.
Texture
Separation that does not mix back, or clumps.
Colour
Change from the usual colour.
Seal
Jar lids that do not pop on opening, or damaged pouches — discard.
Can you freeze breast milk?
- 1Step 1
Freeze only what the guidance allows, in clean, sealed containers.
- 2Step 2
Label with the date and time.
- 3Step 3
Thaw in the fridge or in warm water; never microwave, and do not refreeze.
How to thaw breast milk
In the fridge
Move it to the fridge the night before; texture holds best.
At room temperature
Only for shelf-stable foods; perishable food should not thaw on the counter.
From frozen
Many foods go straight into soups, sauces, smoothies or the oven.
Breast milk left out overnight
Breast milk left at room temperature for more than 2 hours (1 hour above 90°F / 32°C) should be thrown away. Bacteria multiply fastest between 40°F and 140°F, and reheating does not remove every toxin they make.
Bacteria multiply fastest between 4 °C and 60 °C (40–140 °F).
Best-by and use-by dates on breast milk
Best-by and sell-by
FoodKeeper gives unopened breast milk 4 hours in the pantry or 4 days in the fridge, counted from the day you buy it. "Best-by" and "sell-by" describe quality and stock rotation, not safety; only infant formula carries a federally required use-by date.
Past the date
For perishable breast milk, the storage clock matters more than the label: if it has been in the fridge longer than 4 days, discard it even before the printed date.
How to store breast milk
- Follow the label and your pediatrician's instructions first.
- Refrigerate prepared or opened products right away.
- Discard anything left in a bottle or bowl the baby has fed from.
Breast milk vs similar foods
- Baby cereal 1 month
- Breast milk 4 days
- Baby food fruit 3 days
- Baby food jars and pouches 2–3 days
- Liquid baby formula 2 days
- Baby food dinners 2 days
- Prepared baby formula 1 day
Same scale as the timeline above: 1 hour to 2 years.
Check any food in seconds: when your leftovers expire, and whether something left out is still safe.
Similar foods
All baby food → Can you freeze… hub → Leftover calculator →Freezer time calculator →Left-out checker →