Calculate water requirements for commercial crop production

The Irrigation Calculator provides broad guidance for water requirements of commercial crops produced in Western Australia.

Average weather data from 25 years, 1990 to 2014, has been used to calculate effective evaporation and allowance should be made for years that are hotter, drier, cooler or wetter than average.

Users must accept the conditions of the disclaimer.  

An account is not required to use the calculator, however registration and creation of a user account will allow previous calculations to be stored.

Page reviewed 20 April 2018