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How long does Peanut butter last in the pantry once opened?

3 kinds · each with its own window

Peanut butter, commercial · Once opened · in the pantry

Use by2 months to 3 months

Counted from the day you opened it

USDA FoodKeeper figure · as published

How this date is worked out

From KeepsUntilIt is past the dateThe FDA and USDA FSIS rules, and where to ask when a date runs out Where these numbers come fromThe USDA source, the parse rules and what this site cannot tell you Every food on the siteOne page, every product, longest first

Turning the range into a date

Peanut butter (commercial) keeps 2–3 months in the pantry once opened. Enter a day and each row becomes a calendar date, worked out in your browser.

Peanut butter, commercial

From purchase · in the pantryUse by6 months to 24 months after the day you bought it
Once opened · in the pantryUse by2 months to 3 months after the day you opened it

Peanut butter, commercially produced, containing hydrogenated fat or other stabilizers

From purchase · in the pantryUse by6 months to 9 months after the day you bought it
Once opened · in the pantryUse by2 months to 3 months after the day you opened it
From purchase · in the fridgeUse by12 months after the day you bought it
Once opened · in the fridgeUse by3 months to 4 months after the day you opened it

Peanut butter, natural

From purchase · in the fridgeUse by12 months after the day you bought it
Once opened · in the fridgeUse by3 months to 4 months after the day you opened it

Peanut butter, commercial · From purchase · in the pantry

6 months to 24 months

Counted from the day you bought it

Every storage figure the USDA publishes for this item

USDA FoodKeeper lists 3 kinds under Peanut butter.

Peanut butter, commercial

From purchase · in the pantry6 months to 24 months
Once opened · in the pantry2 months to 3 months

Peanut butter, commercially produced, containing hydrogenated fat or other stabilizers

From purchase · in the pantry6 months to 9 months
Once opened · in the pantry2 months to 3 months
From purchase · in the fridge12 months
Once opened · in the fridge3 months to 4 months

Peanut butter, natural

From purchase · in the fridge12 months
Once opened · in the fridge3 months to 4 months

What the USDA adds in words

Word for word from the FoodKeeper record.

Peanut butter, natural, in the refrigerator, from the day you bought it. Or package use-by date, whichever comes first.

From KeepsUntilWhere these numbers come fromThe USDA source, the parse rules and what this site cannot tell you

What USDA FSIS and the FDA say about this food

For: Peanut butter, commercial · Peanut butter, commercially produced, containing hydrogenated fat or other stabilizers · Peanut butter, natural

FOODHANDLINGREASON
Peanut butter, legumes and nutsDiscardFoods processed without preservatives are at high risk for mold.

USDA FSIS, Molds on Food: Are They Dangerous?, retrieved 4 November 2026. Quoted word for word.

Other foods on the same USDA shelf

Food safety rules that apply to every food

Keep the refrigerator temperature at or below 40° F (4° C). The freezer temperature should be 0° F (-18° C).
Never allow meat, poultry, seafood, eggs, or produce or other foods that require refrigeration to sit at room temperature for more than two hours—one hour if the air temperature is above 90° F.
Though food will be safe indefinitely at 0° F, quality will decrease the longer the food is in the freezer.
Never thaw food at room temperature, such as on the counter top. There are three safe ways to defrost food: in the refrigerator, in cold water, and in the microwave. Food thawed in cold water or in the microwave should be cooked immediately.
Perishable foods should never be thawed on the counter, or in hot water and must not be left at room temperature for more than two hours.
If you're not sure or if the food looks questionable, throw it out.

Sources: FDA: are you storing food safely · FDA: safe food handling · USDA FSIS: safe defrosting.

Where these numbers come from

Every figure and note on this page is reproduced from USDA FoodKeeper as published; the calendar date is the only arithmetic, and it runs in your browser.

Source: USDA FoodKeeper, retrieved 1 September 2026. A figure that does not match the source? Tell us. How the site is built.

The answer at the top is for Peanut butter, commercial, the kind this site shows first; every kind the USDA lists under this name is printed with its own figures.

USDA index terms: butter, commercial, commercial peanut butter, fat, hydrogenated fat, natural, peanut, stabilizer, stabilizers

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. Storage times are reproduced from USDA FoodKeeper as published; when in doubt, follow the FDA and USDA FSIS guidance linked on every food page.