How long does Duck fat last in the fridge?
Turning the range into a date
Duck fat keeps 30 days in the fridge. One row, one deadline: 30 days in the refrigerator, counted from the day it went in rather than the day it was made.
- In the fridgeUse by30 days after the day you stored it
A short window, and what shortens it further
This item is one of the short-lived entries in the data: 30 days outside the freezer, position 34 of 41 in the Condiments, Sauces & Canned Goods list. At that scale a day of delay is a large share of the whole window, which is why the figure is printed as a range rather than an average. On the same shelf it sits 34 of 41, between Salad dressing at 6 months and Frying oil, re-used at 1 month.
Every storage figure the USDA publishes for this item
The refrigerator is the only place the USDA gives this item a storage time, as it does for 64 of the 466 foods the USDA lists.
- In the fridge30 days
Can you freeze duck fat?
The USDA prints no freezer time for duck fat. Frozen at 0 °F any food stays safe; whether it is still good after thawing is a matter of quality. Keep the fridge at 40 °F or below and the freezer at 0 °F.
How to tell if duck fat has gone bad
Go by the date first: duck fat keeps 30 days in the fridge. A bulging, leaking or badly dented can, or a jar whose lid has popped, goes out unopened; so does mold or fizzing in an opened one. Once opened, keep it in the fridge at 40 °F or below.
Sources: USDA FSIS: the danger zone USDA FSIS: freezing and food safety FDA: are you storing food safely FoodSafety.gov: the FoodKeeper app.
Is it still safe to eat, or just past its best?
The answer at the top of this page reads 30 days in the fridge. What decides that is the food and not the shelf the source files it on: Duck fat is acid, dry, sweet, alcoholic or pure fat. Past it, whether it has gone bad is yours to judge by look and smell: this window rates quality, not the day it turns hazardous.
It is past the date. Now what?
Say the calculator above puts Duck fat past its 30 days in the fridge window. Past that the calendar stops deciding and the food itself does. A jar or can that is bulging, leaking or rusted goes out unopened, and so does an opened one with mold at the rim or a sour, fizzing smell.
The whole rule, including the cases the source does not cover, is set out under what to do when the date has passed.
Items that behave the same way
Every one of the 6 nearest items keeps the same or less, 4 days to 1 month against the 30 days of this item, which makes it the durable end of the cluster.
- Frying oil, re-usedkeeps exactly as long
- Chicken broth/stock/consommé, commercially producedkeeps 3–4 days in the fridge once openedup to 7 days in the fridge
- Vegetable stock/broth, commercially producedkeeps 3–4 days in the fridge once openedup to 7 days in the fridge
- Tomato saucekeeps 3–5 days in the fridge once openedspaghetti, pizza
- Broth, homemadekeeps 3–4 days in the fridge
- Aioli, homemadekeeps 3–4 days in the fridge
Where these numbers come from
Every storage time on this page is the USDA’s own published figure from the FoodKeeper data, one of the 9 it keeps per food, reproduced unchanged and never an estimate of ours. Where the USDA lists several kinds under one name, each kind keeps its own windows, and the page names the kind its answer is for. The dates and multipliers are ours, computed from those ranges.
Source: USDA FoodKeeper, retrieved 1 September 2026. Found a figure that does not match the source? Tell us on the contact page. How the site is built is on the method page.
USDA index terms: duck
KeepsUntil is an independent reference built on public USDA data. It is not affiliated with, endorsed by, or connected to the U.S. Department of Agriculture or the Food and Drug Administration. Whether a given window is a safety limit or a quality window is stated on the page that prints it.