Have you ever wondered how much rain falls on your roof during a typical rain storm? Use this simple rain harvesting calculator to find out. You will be amazed at how much water can be collected from your roof (or any other surface) during even the shortest of rain storms. Why not collect and store this wonderful natural resource and put it to good use later to water your organic garden?
A simple calculator interface allows for the input of:
Catchment surface area in square feet or square meters
Rainfall in inches or millimeters
Surface efficiency as a percentage
Number of collection points
The final result is then presented in total gallons or liters of collected runoff. Gallons or liters per collection point is also calculated when more than one collection point is entered into the calculator.
Happy Rain Harvesting!
Completely new user interface for iOS 8.
You can now save, add, edit and search multiple calculations.
Email and print your calculations.
Ratings and Reviews
Great for contractors
Easy to use for quick information on potential system size and design.
Does exactly what it says it does. Simple & effective.
Fast & Simplistic
This is a great app for giving you an idea for collecting rainwater!
With Family Sharing set up, up to six family members can use this app.