Vapor Pressure Deficit (VPD) Calculator
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Input Parameters
Instant Real-time Calculation
Air Temperature
°C
Relative Humidity (RH)
%
Leaf Temperature Offset (Tleaf - Tair)
°C
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Result
Biology
Vapor Pressure Deficit (VPD)
--
kPa
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Calculation Logic:
Optimal vegetative growth occurs at 0.8–1.1 kPa; flowering stages benefit from 1.1–1.4 kPa.