Enter the total water needed (gallons) and the sprinkler flow rate (gallons/min) into the Calculator. The calculator will evaluate the Sprinkler Run Time.

## Sprinkler Run Time Formula

SRT = TW / FR

Variables:

- SRT is the Sprinkler Run Time (min)
- TW is the total water needed (gallons)
- FR is the sprinkler flow rate (gallons/min)

To calculate Sprinkler Run Time, divide the total water required by the sprinkler flow rate.

## How to Calculate Sprinkler Run Time?

The following steps outline how to calculate the Sprinkler Run Time.

- First, determine the total water needed (gallons).
- Next, determine the sprinkler flow rate (gallons/min).
- Next, gather the formula from above = SRT = TW / FR.
- Finally, calculate the Sprinkler Run Time.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

total water needed (gallons) = 500

sprinkler flow rate (gallons/min) = 4.6