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Accelerated Ageing Time Calculator

Work out accelerated ageing time instantly with clear inputs, formula shown and shareable results.

About Accelerated Ageing Time Calculator

ASTM F1980-style accelerated ageing compresses shelf life testing using the Q10 relationship: the acceleration factor is Q10^((T_accelerated - T_ambient)/10), and the required oven time is the desired shelf life divided by that factor. With Q10 = 2 at 55 C against 23 C ambient, three years compresses to about 50 days.

Formulas

Acceleration factor

AF = Q10^((T_accelerated - T_ambient) / 10)

Oven time

Accelerated ageing time = desired shelf life / AF

Worked example

With the default values below, Accelerated Ageing Time Calculator returns Acceleration Factor of 9.1896. Change any input above and every figure here is recalculated in your browser.

Inputs used

Desired Real-Time Shelf Lifeminimum 0.01 months
36 months
Accelerated Ageing Temperatureminimum -50 degrees C
55 degrees C
Ambient Reference Temperatureminimum -50 degrees C
23 degrees C
Q10 Factorminimum 1.01
2

Results

Accelerated Ageing Duration
119.09
Acceleration Factor
9.1896
Duration In Weeks
17.01
Temperature Difference
32.0

Step by step

  1. 1Values used
  2. 2Acceleration factor
  3. 3Oven time
  4. 4Acceleration Factor= 9.1896
  5. 5Accelerated Ageing Duration= 119.09
  6. 6Duration In Weeks= 17.01
  7. 7Temperature Difference= 32.0

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Accelerated ageing protocols for sterile barrier systems and medical devices must follow the applicable standard and be confirmed by real-time ageing data.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Accelerated ageing protocols for sterile barrier systems and medical devices must follow the applicable standard and be confirmed by real-time ageing data.

Frequently Asked Questions

Why is Q10 = 2 the conservative default?

It is the value ASTM F1980 recommends when product-specific data is unavailable, because it under-estimates acceleration and therefore over-tests. Higher assumed values shorten the test but risk claiming unproven shelf life.

Does accelerated ageing replace real-time studies?

No. It supports an interim claim while real-time ageing runs in parallel. Regulators expect real-time data to confirm the accelerated result.

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