Enter the volume of fluid and the time it takes to flow to determine the flow rate in liters per second. This calculator helps in measuring the rate of fluid flow in a given time frame.

Flow Rate Formula

The following formula is used to calculate the flow rate.

FR = V / T

Variables:

  • FR is the flow rate (liters per second)
  • V is the volume of fluid (liters)
  • T is the time (seconds)

To calculate the flow rate, divide the volume of fluid by the time it takes for that volume to flow.

What is Flow Rate?

Flow rate is a measure of the volume of fluid that passes through a point in a given time. It is commonly used in engineering and physics to describe the movement of liquids and gases through pipes or other channels. The flow rate can be affected by the cross-sectional area of the pipe, the pressure and temperature of the fluid, and the nature of the fluid itself.

How to Calculate Flow Rate?

The following steps outline how to calculate the Flow Rate.


  1. First, determine the volume of fluid (V) in liters.
  2. Next, determine the time (T) in seconds.
  3. Next, gather the formula from above = FR = V / T.
  4. Finally, calculate the Flow Rate (FR) in liters per second.
  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.

volume of fluid (V) = 500 liters

time (T) = 250 seconds