ASTM F1980 Accelerated Aging Time Calculator
Packaging and device teams need to know how long to keep samples in an oven to represent a given shelf life. This calculator applies the Q10 reaction-rate rule used in accelerated aging practices and shows the schedule for your chosen temperature.
Your numbers
2.0 is the conservative value commonly used for packaging when no material data is available.
Standard guidance cautions against going above 60 C for polymer packaging.
Your results
The Q10 model is a planning tool. Studies for a submission also need real-time aging in parallel and a documented rationale for the Q10 value and acceptance criteria.
Aging days vs oven temperature
Sweeps Accelerated aging temperature from 40 to 60, holding your other inputs fixed.
Expiry dating inside your ERP
Want shelf life and expiry rules enforced in lot control? We can review your setup.
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How to use it
Enter the shelf life claim in months, the Q10 value, the oven temperature and the ambient storage temperature. The tool reports the accelerated aging factor and the number of days and weeks to hold the samples. Use the chart to compare oven temperatures, since a few degrees can shift the study length by weeks. Add time for conditioning and for the sampling pull points your protocol requires.
The formula
The Arrhenius-based rule of thumb says reaction rates multiply by Q10 for every 10 C rise. The aging factor is therefore Q10 to the power of (T_AA minus T_RT) divided by 10. Test time equals the real-time period divided by that factor. With Q10 of 2, 55 C and 22 C, the factor is about 9.85, so 36 months of shelf life needs about 111 days.
- AAF = Q10 ^ ((T_AA - T_RT) / 10)
- Test time = real time / AAF
- A higher Q10 shortens the study but needs justification
Common mistakes
Using a Q10 above 2 without material data invites reviewer questions. Using a temperature at which the polymer softens or the adhesive changes behavior gives a result that does not represent real aging. Humidity and package seal strength also matter, so many protocols test seal strength and integrity at each time point rather than only at the end. Accelerated aging never replaces real-time aging, which should run in parallel to confirm the claim.
Frequently Asked Questions
Why is Q10 usually set to 2?
It is a conservative default used when no material-specific kinetics are known. It means the rate doubles per 10 C. A higher value shortens the study but needs data to defend it.
Does this prove the shelf life claim?
It sets the test duration. The claim is supported when samples still meet the performance and integrity criteria after aging, together with real-time data collected in parallel.
Which ambient temperature should I use?
Use the labeled storage condition or the typical controlled storage temperature, commonly in the range of 20 to 25 C. A lower ambient value increases the aging factor, so choose it carefully and document it.
Can I age at 60 C to save time?
You can calculate it, but many polymers and adhesives change behavior near or above 60 C. Choose a temperature that stays below any material transition and keep the oven within the tolerance in your protocol.
If shelf life and expiry dating are tracked by hand across ERP lots and labels, we can help review how to automate it.
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