Enter the total volume (m^3) and the flow rate (m^3/s) into the Calculator. The calculator will evaluate the Duration Of Flow. 

Duration Of Flow Formula

DOF = V / FR


  • DOF is the Duration Of Flow (seconds)
  • V is the total volume (m^3)
  • FR is the flow rate (m^3/s)

To calculate Duration Of Flow, divide the total volume by the total flow rate.

How to Calculate Duration Of Flow?

The following steps outline how to calculate the Duration Of Flow.

  1. First, determine the total volume (m^3). 
  2. Next, determine the flow rate (m^3/s). 
  3. Next, gather the formula from above = DOF = V / FR.
  4. Finally, calculate the Duration Of Flow.
  5. 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 volume (m^3) = 400

flow rate (m^3/s) = 500