What is Shelf Life?
Shelf life is the length of time a perishable product remains safe, effective, and fit for consumption under recommended storage conditions. For food exporters, shelf life is not just a quality measure — it determines whether a product can legally and practically be shipped to an overseas market.
The 50% Rule Explained
The 50% rule is a widely used threshold in perishable goods logistics between Australia and Dubai. It works like this:
- Calculate the total shelf life of the product (from production date to best-before date).
- Calculate how many days the product spends in Australia — from production until it arrives in Dubai (the ETA).
- If the time in Australia is 50% or more of the total shelf life, the product is classified as Short Shelf Life and should not be shipped.
- If the time in Australia is less than 50%, the product has Good Shelf Life and is cleared for export.
This rule ensures that Dubai buyers receive products with meaningful remaining shelf life, giving retailers and consumers enough time to purchase and use the goods before expiry.
How to Use This Calculator
- Enter the product name for your reference.
- Enter the ETA — the date the shipment is expected to arrive in Dubai.
- Enter the Best Before date printed on the product packaging.
- Enter the Total Shelf Life duration and select the unit (days or months).
- Click calculate to see the full breakdown and shipping recommendation.
The calculator will show you exactly how many days the product spends in Australia versus Dubai, the percentage split, and a clear pass or fail status.
Formula
The calculation follows three steps:
Step 1 — Shelf Life Start Date: Shelf Life Start = Best Before − Total Shelf Life
Step 2 — Time Splits: Days in Australia = ETA − Shelf Life Start Days in Dubai = Best Before − ETA
Step 3 — Percentage and Status: Australia % = (Days in Australia ÷ Total Shelf Life Days) × 100 If Australia % ≥ 50% → Short Shelf Life (do not ship) If Australia % < 50% → Good Shelf Life (can ship)
Worked Example
A dairy company in Melbourne wants to ship fresh yoghurt to Dubai.
- Total Shelf Life: 90 days
- Best Before: 01-04-2025
- ETA in Dubai: 15-01-2025
Step 1: Shelf Life Start = 01-04-2025 minus 90 days = 01-01-2025
Step 2:
- Days in Australia = 15-01-2025 − 01-01-2025 = 14 days
- Days in Dubai = 01-04-2025 − 15-01-2025 = 76 days
Step 3:
- Australia % = 14 ÷ 90 × 100 = 15.6%
- 15.6% is less than 50% → GOOD SHELF LIFE — Product can be shipped
The yoghurt arrives in Dubai with 76 days of shelf life remaining, well within acceptable limits.
FAQ
What happens if the Australia percentage is exactly 50%? At exactly 50%, the product is classified as Short Shelf Life and should not be shipped. The threshold is strict — the product must spend less than 50% of its shelf life in Australia to qualify.
Does this calculator account for different storage conditions? No. This calculator assumes the product is stored correctly throughout its journey. Temperature abuse, broken cold chains, or improper handling can reduce effective shelf life regardless of the dates.
Can I use this for non-food perishable goods? Yes. The 50% rule applies to any perishable product with a defined shelf life — cosmetics, pharmaceuticals, or agricultural products. Enter the total shelf life and dates as usual.
What if my shelf life is defined in months, not days? Select "Months" as the unit. The calculator will subtract calendar months from the best-before date to determine the shelf life start. For example, 6 months before 15-06-2025 is 15-12-2024.
Why is the ETA date important, not the shipping date? The ETA (arrival in Dubai) is what matters because it marks the boundary between time spent in Australia and time available in Dubai. Transit time is included in the Australia portion of the calculation.