Expiration Date Calculator

To calculate the expiration date manually, take the date the product was manufactured and add the specified shelf life duration, which is usually expressed in days, months, or years. Our calculator automates this addition instantly, accounting for varying month lengths and leap years so you get an accurate calendar result without counting days on your fingers.

Most consumer packaged goods feature stamped or printed expiration codes directly on the packaging, often labeled as 'use by,' 'sell by,' or 'best before.' If you only have the production date and a known shelf-life duration from the manufacturer, you can use a tracking calculator to project the exact expiration date reliably.

Eggs can often remain safe to consume past their printed date if they have been refrigerated properly at or below 40 degrees Fahrenheit. You can test their freshness by placing them in a bowl of water; if they sink flat to the bottom, they are fresh, whereas floating eggs indicate accumulated air and a loss of freshness over time.

If a product has a longevity or shelf life of 36 months, its expiration date is exactly three years from its initial date of manufacture. For example, if it was manufactured on May 10, 2024, adding 36 months means the product will reach its target expiration limit on May 10, 2027, provided it remains unopened and stored correctly.