Coffee lasts for varying lengths depending on its form and storage:

• Whole-bean coffee can last from 6 months to 1 year unopened if stored properly, though the best flavors fade after about 3 weeks from roasting.
• Ground coffee lasts 1-3 months unopened but once opened, its freshness degrades quickly, best consumed within 1-3 months.
• Brewed coffee is safe to drink for up to 12 hours at room temperature, but flavor deteriorates rapidly. Refrigerated brewed coffee can last 3-4 days but with diminished taste.
• Cold brew concentrate lasts 1-2 weeks in the fridge before going stale.
• Instant coffee can last years unopened and about a year after opening if stored well.

Proper airtight storage away from heat, moisture, and light is key to maximizing coffee lifespan.