Know your vapor pressure deficit at a glance.
VPD is a fast, focused calculator for monitoring plant-growing conditions. Enter air temperature and relative humidity for an instant Air VPD reading. Turn on leaf temperature when you want a leaf-specific result.
Features:
• Live VPD calculations in kPa
• Air VPD and optional Leaf VPD
• Editable values and smooth, one-handed sliders
• °F and °C conversion that preserves the actual temperature
• Negative leaf VPD retained with a clear possible-condensation warning
• Your latest values and temperature unit remembered automatically
• Fully offline
• No account, ads, subscriptions, analytics, or tracking
Whether you’re checking a grow room, greenhouse, or garden, VPD gives you the number you need without dashboards or distractions.
VPD is a calculation aid, not a replacement for calibrated sensors or professional cultivation advice.
