How long does Sugar last in the pantry once opened?
Turning the range into a date
Sugar (granulated) keeps 18–24 months in the pantry once opened. Each kind gets its own dated rows here, 3 rows across the 3 the USDA lists under this name, because a date is only worth printing against the window it belongs to.
Sugar, brown
- Once opened · in the pantryUse by18 months to 24 months after the day you opened it
Sugar, granulated
- Once opened · in the pantryUse by18 months to 24 months after the day you opened it
Sugar, confectioners
- Once opened · in the pantryUse by18 months to 24 months after the day you opened it
The USDA rates 3 kinds of this separately
The USDA files 3 separate entries under this name — brown, granulated and confectioners — and gives every one of them the same window outside the freezer, 18 months to 24 months. They are separate rows in the source rather than separate answers to the question.
The methods the USDA actually rates for this item
The USDA rates only 1 of its nine storage methods anywhere in the 3 kinds it lists under this name, and the pantry after opening is what it rates. The other 8 slots are blank in every kind, and a blank is not a zero. On the same shelf it sits 18 of 52, between Cornstarch at 24 months and Baking powder at 18 months. Brown, granulated and confectioners are the same food in the source list.
Every storage figure the USDA publishes for this item
The USDA rates this item in the pantry and nowhere else, one of 84 foods of the 466 it files that way. The source also indexes it as brown, granulated, confectioners and confectioner.
Sugar, brown
- In the pantryIndefinitely
- Once opened · in the pantry18 months to 24 months
Sugar, granulated
- In the pantryIndefinitely
- Once opened · in the pantry18 months to 24 months
Sugar, confectioners
- In the pantryIndefinitely
- Once opened · in the pantry18 months to 24 months
Where the USDA answers in words instead of days
1 of the nine slots the USDA keeps for this item holds an answer that is not a number, and an answer in words is still an answer: in the pantry it answers Indefinitely, so kept that way the food does not run out of time, though it can still lose quality.
What the USDA adds in words
The USDA attaches 3 handling notes to this item, reproduced below word for word. None of them is a storage time: they qualify the figures above rather than replacing them. These are the source's own sentences, not ours, and they are the part of the FoodKeeper record that a table of durations cannot carry.
Sugar, brown, in the pantry. Sugar never spoils, but for best quality use within 2 years of opening.
Sugar, granulated, in the pantry. Sugar never spoils, but for best quality use within 2 years of opening.
Sugar, confectioners, in the pantry. Sugar never spoils, but for best quality use within 2 years of opening.
Can you freeze sugar?
The USDA prints no freezer time for sugar. 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 sugar has gone bad
Go by the date first: sugar keeps 18–24 months in the pantry once opened. Insects, a musty or rancid smell, clumping from damp, or a swollen can mean it goes out. Any dish you cook with it follows the 2-hour rule, 1 hour above 90 °F.
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 18 months to 24 months in the pantry once opened. The USDA rating this place at all is the USDA saying Sugar, granulated keeps there, so the figure rates how good it will be. 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 Sugar, granulated past its 18 months to 24 months in the pantry once opened window. Past that the calendar stops deciding and the food itself does. Mold takes the whole package out rather than the slice it grew on, and so does a musty or old-oil smell in a flour or a mix.
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
The 6 items nearest it sit inside a band of 24 months to 2 years — a tight cluster, and Sugar, granulated at 24 months is inside it.
- Cornstarchkeeps exactly as long
- Chocolate, unsweetened and semi-sweet, solidkeeps 1 year in the pantry once opened
- Cornmealkeeps 6–12 months sealed in the pantryregular, degerminated · up to 2 years in the pantry once opened
- Vegetable oil sprayskeeps 1 year in the pantry once openedup to 2 years sealed in the pantry
- Sugar substituteskeeps 2 years sealed in the pantry
- Whole wheat flourkeeps 2 years 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.
Comparisons and the place in the category are computed for Sugar, granulated, which is the kind the plain name means here, chosen kind by kind rather than by the order the source happens to list them in.
USDA index terms: brown, confectioner, confectioners, granulated
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.