Food Water Activity BET GAB Isotherm Calculator
Determine equilibrium moisture content, water activity ($a_w$), BET and GAB monolayer moisture capacity, and critical microbial stability thresholds.
Isotherm Model & Food Matrix
Relative humidity = a_w × 100%
Equilibrium Sorption & Safety
Dry Basis Moisture (m)
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Wet Basis Moisture (w)
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Relative Humidity
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Monolayer Cov.
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Microbial Status
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Shelf Stability & Spoilage Diagnosis
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