Enter the flow rates in two parallel pipes into the calculator to determine the total flow rate. This calculator helps in understanding the combined flow rate when two pipes are working in parallel.

Parallel Pipe Flow Formula

The following formula is used to calculate the total flow rate in parallel pipes.

Q_{total} = Q_1 + Q_2

Variables:

  • Q_{total} is the total flow rate through the parallel pipes (gallons per minute)
  • Q_1 is the flow rate in Pipe 1 (gallons per minute)
  • Q_2 is the flow rate in Pipe 2 (gallons per minute)

To calculate the total flow rate in parallel pipes, add the flow rate in Pipe 1 to the flow rate in Pipe 2.

What is Parallel Pipe Flow?

Parallel pipe flow refers to the situation where two or more pipes are connected in such a way that they carry a portion of the total flow from the same source to the same destination. The total flow rate is the sum of the flow rates in each individual pipe. This concept is important in fluid dynamics and is commonly used in plumbing, heating, and cooling systems to distribute fluids efficiently.

How to Calculate Total Flow Rate in Parallel Pipes?

The following steps outline how to calculate the total flow rate in parallel pipes.


  1. First, determine the flow rate in Pipe 1 (Q_1) in gallons per minute.
  2. Next, determine the flow rate in Pipe 2 (Q_2) in gallons per minute.
  3. Next, gather the formula from above = Q_{total} = Q_1 + Q_2.
  4. Finally, calculate the Total Flow Rate (Q_{total}) in gallons per minute.
  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.

Flow rate in Pipe 1 (Q_1) = 15 gallons per minute

Flow rate in Pipe 2 (Q_2) = 20 gallons per minute