Quickly calculate drying environment variables with this easy to use application. Just enter two values – temperature and relative humidity – and the Dri-Eaz Psychrometric Calculator will instantly produce the correct grains per pound (GPP) calculation. Makes evaluating drying progress a snap! Includes English, Spanish, and French language options. Disclaimer: Dri-Eaz reserves the right to anonymously collect data about its app usage. This information will not be shared and will only be used for improving our apps. No personal identifying information will be recorded.