Snacks
Lay's / Frito-Lay Batch Code Decoder
Frito-Lay's potato chips, tortilla chips, and similar salty-snack lines carry a four-digit Julian production date printed on the back seal of the bag.
Decode your Lay's / Frito-Lay code
Format: YJJJ + plant. Example:
Enter a code above to decode the production date.
Format
YJJJ + plant
Example
6099FL
Year digit 6 + DOY 099 + plant FL (Frito-Lay).
Typical freshness
65 days
from production date
About Lay's / Frito-Lay batch codes
Frito-Lay, the PepsiCo subsidiary behind Lay's, Doritos, Cheetos, Ruffles, Tostitos and dozens of other salty-snack brands, prints a Julian production date on the back seal of every bag. The format is a four-character YJJJ (one year digit + three day-of-year digits) optionally followed by a plant code. Lay's potato chips have a remarkably short best-by window of approximately 65 days from production — after that the oil in the chips starts to oxidize and the flavor goes stale even though the product is still safe. Doritos and other tortilla-based chips last slightly longer, about 75 days, because the corn masa is less oil-rich than a potato chip. Consumers who care about chip freshness can read the Julian off the back of the bag and compute the remaining shelf life directly. The short freshness window is also why Frito-Lay has one of the most intensive direct-store-delivery networks in the food industry: route drivers rotate stock weekly and pull any bag whose Julian indicates it is more than 65 days old.
Need the general technique for any package? See how to read a Julian date code. For the regulatory background on lot traceability, read the manufacturing guide, or convert any date on the converter.
This decoder is based on Lay's / Frito-Lay's publicly documented code format. Manufacturers can change codes without notice — treat the result as an estimate and check any printed best-by date.