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VPD Calculator (Vapor Pressure Deficit)
Calculate vapor pressure deficit in kPa for indoor grow room climate control
Formula: $\text{VPD} = \text{SVP}_{\text{leaf}} - \text{SVP}_{\text{air}}$. Saturation Vapor Pressure ($\text{SVP}$) is calculated using the formula: $\text{SVP} = 0.6108 \times e^{(17.27T / (T + 237.3))}$ kPa.
Climate Conditions
Calculation Results
⚠️ Optimal VPD ranges vary depending on plant growth stages (propagation clones require lower VPD ~0.4–0.8 kPa, vegetative stage ~0.8–1.2 kPa, and flowering stage ~1.2–1.5 kPa). Monitor sensor accuracy regularly to prevent plant stress or mold growth.