Expiration Date Calculator
The Expiration Date Calculator adds a shelf life in days to a manufacturing or start date to find the expiry date, and shows how many days remain from today.
Formula
Expiration Date = Start Date + Shelf Life (days)
- Shelf life is counted in calendar days from the start date.
- Days remaining is measured from today.
1 Jan 2026 + 180 days
Inputs
- Manufacture / Start Date: 2026-01-01
- Shelf Life: 180 days
180 days after 1 January 2026 is 30 June 2026.
Frequently asked questions
How is the expiry date calculated?
The shelf life in days is added to the manufacture or start date to get the expiration date.