Product Expiration Tracker

Track skincare product expiration based on PAO (period after opening), storage conditions, and product type.

Inputs

PAO (Period After Opening)

months

Months Since Opened

months

Product Type

Storage Conditions

Tab to move between fields

Results

Status

Good — Use Regularly

Months Remaining4.8 months

Days Remaining146 days

Effective PAO11 months

Lifespan Used56%

How to Use This Calculator

Select the product category (serum, moisturizer, sunscreen, etc.).
Enter the manufacture or opening date.
Input the period-after-opening (PAO) number shown on the product packaging.
Review the Expiration Date and Days Remaining outputs.
Use the Status indicator to decide whether to continue using or discard the product.

What each input means

PAO (Period After Opening): Number on the open-jar icon on packaging (e.g., 12M = 12)
Months Since Opened: How many months since you first opened the product
Product Type: Type of product formula
Storage Conditions: Where you store the product

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
PAO (Period After Opening) = 12, Months Since Opened = 6, Product Type = 1, Storage Conditions = 2 = 4 input(s) provided
Calculate Status
Status
Good — Use Regularly = Good — Use Regularly
Calculate Months Remaining
Months Remaining
4.8 = 4.8
Calculate Days Remaining
Days Remaining
146 = 146

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