Expiry Date Calculator
Calculate expiration dates and manage product shelf life
What is Expiry Date Calculator?
Expiry Date Calculator is an online tool that helps you quickly calculate product expiration dates or estimate production dates. Simply enter the production date and shelf life days to get the exact expiration time, or enter the expiry date to reverse-calculate the production date. Supports batch adding of multiple products with real-time remaining days reminder, making it easy to manage food, medicine, cosmetics shelf life at home.
This tool runs locally in your browser, no data upload required, protecting your privacy.
How to Use
- Select calculation mode: Production→Expiry or Expiry→Production
- Enter date and shelf life days
- Click Calculate to see results
- Add to product list for batch management
Application Scenarios
Food expiry: Calculate expiration of milk, bread, snacks
Medicine validity: Manage home medicines, avoid expired drugs
Cosmetics shelf life: Usage period after opening
FAQ
Q: Difference between shelf life and validity period?
A: Shelf life is typically used for food, indicating the period it's safe to eat under proper conditions. Validity period is for medicine, indicating usable period. Both are calculated the same way: production date plus shelf life days.
Q: Why some products mark "shelf life after opening"?
A: Some products (like cosmetics, some foods) have shorter shelf life after opening. Mark the opening date and recalculate expiry based on after-opening shelf life.
Q: Can expired products still be used?
A: Expired food is not recommended for consumption, may have safety risks. Expired medicine may have reduced efficacy or harmful substances. Expired cosmetics may cause skin problems.
Q: What shelf life units are supported?
A: Supports days, months, and years. Months calculated as 30 days, years as 365 days. Choose corresponding unit for products marked in months or years.