DLI & VPD Calculator
Calculate essential growing metrics for optimal plant health
DLI Calculator
Calculate Daily Light Integral
VPD Calculator
Calculate Vapor Pressure Deficit
Understanding DLI & VPD
Daily Light Integral (DLI)
DLI measures the total amount of PAR (photosynthetically active radiation) received in a day. Optimal DLI ranges:
- Seedlings: 10-20 mol/m²/day
- Vegetative: 20-30 mol/m²/day
- Flowering: 30-40 mol/m²/day
Vapor Pressure Deficit (VPD)
VPD is the difference between the amount of moisture in the air and how much moisture the air can hold when saturated. Optimal VPD ranges:
- Clones: 0.4-0.8 kPa
- Vegetative: 0.8-1.2 kPa
- Flowering: 1.0-1.5 kPa