Calculate expiration dates for food, medicine, documents, and more by adding shelf life to a start date.
The Expiration Date Calculator finds when an item, document, or product expires based on its start date and shelf life. It is useful for food labels, medicine packaging, warranties, and any record with a defined validity period.
The calculator supports shelf life in days, weeks, months, or years and can show how much of that life has already passed. It also gives you the time remaining until expiration so you can tell whether something is still fresh, close to expiring, or already past its date.
Use it whenever the expiry date matters more than a rough estimate.
Tracking expiration dates helps you avoid using items too late and makes it easier to manage shelf life, renewal dates, and other time-limited records. This calculator keeps the start date, shelf life, and remaining time in one place so you do not have to recalculate each item manually.
Expiration Date = Start Date + Shelf Life Duration. Remaining Life = Expiration Date - Today. Life Used (%) = (Today - Start Date) / Shelf Life × 100.
Result: July 15, 2026
An item with a start date of January 15, 2026 and a 6-month shelf life expires on July 15, 2026.
There are several types of date labels. "Sell By" tells stores when to remove items from shelves. "Best Before" or "Best By" indicates peak quality. "Use By" is the last recommended date for consumption. "Expiration Date" is most strict and common on medications. Understanding these distinctions prevents unnecessary food waste while maintaining safety.
Dairy products typically last 1-3 weeks refrigerated. Fresh meat lasts 3-5 days in the fridge. Canned goods last 2-5 years. Dry pasta and rice last 1-2 years. Medications typically have 1-5 year shelf lives. Cosmetics vary from 3 months (mascara) to 2 years (perfume). Documents range from 1 year (some certifications) to 10 years (passports).
Proper storage is the key to reaching or exceeding labeled expiration dates. Keep refrigerated items at 35-40°F (2-4°C). Store dry goods in airtight containers away from light. Keep medications at room temperature unless otherwise directed. Freezing extends the life of most foods by months or years. The FIFO (First In, First Out) method ensures you use older items before newer ones.
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"Use by" indicates safety — don't consume after this date. "Best before" indicates quality — the item is safe but may lose flavor or texture after this date.
In the US, only infant formula requires a federal expiration date. Other dates are voluntary (except where state law mandates). However, they're still important safety guidelines.
Yes. While many medications remain safe past expiration, their potency decreases over time. Critical medications like insulin, nitroglycerin, and epinephrine should never be used past expiry.
Improper storage (heat, humidity, light) can shorten actual shelf life below the labeled date. Always follow storage instructions for accurate expiration.
Yes — enter the issue date and validity period. Passports are typically 10 years, driver's licenses 4-8 years, and many certifications 1-3 years.
It shows what fraction of the total shelf life has been consumed. Below 50% is fresh, 50-80% is aging, and above 80% is nearing expiry.