Vapour Pressure Deficit Calculator

Use this calculator for determining the Vapour Pressure Deficit (VPD) of the air, which is a measure of the difference between the amount of moisture in the air and the maximum amount of moisture that the air can hold at a given temperature.

This calculator takes into account the relative humidity, air temperature, and canopy temperature to calculate the VPD.

The VPD is an important factor in plant physiology, as it affects plant transpiration rates, water use efficiency, and growth. By accurately calculating the VPD, you can optimize growing conditions for plants in greenhouses, hydroponics, and other indoor or outdoor growing environments.