Flow Rate Calculator
Enter the values of Velocity and Area in the respected boxes to find the pipe flow rate of a fluid by using flow rate calculator.
Table of Contents:
Flow Rate Calculator helps to calculate the flow rates of water and other fluids passing through a cross-sectional area. It uses the velocity of the fluid and the area of the place it passes through.
This pipe flow calculator can calculate:
- Flow Rate
- Flow Velocity
- Flow Area
What is Flow Rate?
Flow rate is defined as
“The volume of fluid each second that is passing through a cross-sectional slice of the pipe.”

Flow Rate formula
The flow rate formula is
Q = vA
Where,
A = cross-sectional area of the pipe,
v = velocity
Finding the flow rate of fluid
Let’s find out how to calculate flow rate manually.
Example:
Find the flow rate of a fluid through an area of 0.7 m2 flowing with a velocity of 3 m/s.
Solution:
Step 1: Write down the values.
A = 0.7 m2
V = 3 m/s
Step 2: Place the values in the flow rate formula
Q = Av
= 0.7 × 3
Q = 2.1 m3/s