Welcome to the Rain Bird online Point Source Emitter Calculation Tool. By answering the following questions, this tool will calculate the Daily Plant Water Requirement (PWR), provide you with the number of emitters required to irrigate each individual plant, and the suggest the run time for your point source drip irrigation project.
Before you begin, please choose the desired units of measurement.   

1. What is the diameter of the plant canopy?

2. What is the type of environment (climate)?   
3. What is the plant water use factor?   
4. What is the estimated system efficiency?   
5. What is your preferred run time in Minutes per Day?  

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