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How long does tuna, packet last?
Tuna, packet keeps for about 18 months in the pantry. Counted from the date of purchase.
| Where | How long |
|---|---|
| Pantry | 18 months |
| Refrigerator, after opening | 3 to 4 days |
Storage times are the USDA FoodKeeper guidance for quality and safety, not a guarantee; a printed use-by date on the package comes first. Source: USDA FSIS FoodKeeper (CC0), fetched 2026-10-27, category Shelf Stable Foods.
How Known uses thisWhen a receipt lists tuna, packet, Known estimates an expiry from the purchase date and typical shelf life and shows which rule it used, for example "7-day rule". Shelf-stable staples get no date at all.
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