Water Activity (Aw) to Shelf Life

Estimate food product shelf life from water activity (Aw) values and predict microbial growth, mold limits, and enzymatic reaction rates.

 
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Physical Constants Reference
ConstantSymbolValue
Speed of lightc2.99792458×10⁸
Planck's constanth6.62607015×10⁻³‴
Boltzmann constant1.380649×10⁻²³
Avogadro's numberNₐ6.02214076×10²³
Gravitational constantG6.6743×10⁻¹¹
Gas constantR8.31446
Elementary chargee1.602176634×10⁻¹⁹
Electron massmₑ9.1093837015×10⁻³¹
Proton massmₚ1.67262192369×10⁻²⁷
Fine-structure constantα7.2973525693×10⁻³
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How It Works

Estimate food product shelf life from water activity (Aw) values and predict microbial growth, mold limits, and enzymatic reaction rates

Each component has a specific meaning:

  • Predict microbial growth — The predict microbial growth recorded for the patient or scenario being assessed.
  • Mold limits — The mold limits recorded for the patient or scenario being assessed.
  • Enzymatic reaction rates — The enzymatic reaction rates recorded for the patient or scenario being assessed.

Note: Interpret the water activity shelf life result against the clinical thresholds and context described above.

How to Use

Enter the predict microbial growth, mold limits, enzymatic reaction rates for the patient or scenario you are assessing. Estimate food product shelf life from water activity (Aw) values and predict microbial growth, mold limits, and enzymatic reaction rates. Use the water activity shelf life result to inform your clinical assessment.

Frequently Asked Questions