Discharge Calculator

Discharge Calculator is a tool designed to calculate the discharge rate of a fluid based on its velocity and cross-sectional area. This calculator proves to be handy in various engineering and environmental applications where the estimation of fluid flow is essential.

Formula: The discharge rate (Q) is determined by multiplying the velocity (V) of the fluid by the cross-sectional area (A) through which it flows.

How to use:

  1. Enter the velocity of the fluid in meters per second (m/s).
  2. Enter the cross-sectional area of the flow passage in square meters (m<sup>2</sup>).
  3. Click the “Calculate” button to obtain the discharge rate.

Example: Let’s assume the velocity (V) of water flowing through a pipe is 5 m/s and the cross-sectional area (A) is 2 m<sup>2</sup>. Using the Discharge Calculator:

Velocity (V) = 5 m/s Cross-Sectional Area (A) = 2 m<sup>2</sup>

Discharge Rate (Q) = V * A = 5 * 2 = 10 m<sup>3</sup>/s

Thus, the discharge rate is 10 m<sup>3</sup>/s.


  1. What is a discharge calculator?
    • A discharge calculator is a tool used to determine the rate of fluid flow based on its velocity and cross-sectional area.
  2. What units are used in the discharge calculator?
    • The calculator uses meters per second (m/s) for velocity, square meters (m<sup>2</sup>) for cross-sectional area, and cubic meters per second (m<sup>3</sup>/s) for discharge rate.
  3. Can the discharge calculator be used for gases as well?
    • Yes, the calculator can be used for both liquids and gases as long as the flow characteristics are known.
  4. Is the calculated discharge rate accurate?
    • The accuracy of the calculated discharge rate depends on the accuracy of the input values provided for velocity and cross-sectional area.
  5. How is the discharge rate formula derived?
    • The formula for discharge rate (Q) is derived from the fundamental principles of fluid mechanics, specifically the relationship between velocity, cross-sectional area, and flow rate.

Conclusion: The Discharge Calculator simplifies the process of estimating fluid flow rates by providing a quick and efficient means of calculation. Whether it’s for hydraulic engineering, environmental monitoring, or any other application involving fluid dynamics, this tool proves to be invaluable in determining discharge rates accurately and efficiently.