01
Refrigerator dates are safety limits
FoodSafety.gov cold storage charts use short refrigerator windows to reduce spoilage and foodborne illness risk. Keep refrigerators at 40 F / 4 C or below and cool leftovers promptly.
Leftover storage life calculator
Calculate refrigerator use-by dates for leftovers.
Calculator input
Storage dates are conservative home-kitchen planning ranges. When food smells off, packaging is damaged, temperature control failed, or the person eating is high-risk, discard or follow official guidance.
USDA FoodKeeper2019-04-26 USDA FSIS FoodKeeper Data2025-01-22 FoodSafety.gov Cold Food Storage Chart2023-09-19 FoodSafety.gov Four Steps to Food Safety2023-09-18
Reference notes
02
Freezer dates are mostly quality dates
Food kept continuously frozen at 0 F / -18 C remains safe indefinitely in official guidance, but texture and flavor decline. The calculator uses quality-oriented planning windows.
03
Inputs for Leftover storage life calculator
Enter Cooked or prepared leftover, Cooked date for the actual recipe, product, and equipment. Treat the output as a baseline, and record the units and input date so the calculation can be reproduced.
04
Formula and 23 reference rows
The selected storage range is added to the entered date. Refrigerator ranges are conservative handling limits; freezer ranges marked as quality do not become safety deadlines.
Frequently asked questions
Can I use smell alone to judge leftovers?
No. Some unsafe food has no obvious smell. Use time, temperature control, and food type together.
Are freezer dates safety deadlines?
Usually no. They are quality windows if the food stayed continuously frozen at 0 F / -18 C or below.
What should I verify after using Leftover storage life calculator?
Check the input units, ingredient or product type, and equipment conditions. For safety and storage topics, manufacturer labels and current official guidance take priority over the calculated date or estimate.