Q:

# How do you calculate water flow for a given pipe size?

A:

To calculate the water flow rate through a given pipe size, multiply the area of the inner cross-section of the pipe by the velocity of the water. The velocity of the water is required for this calculation.

## Keep Learning

Pipe sizes are usually given in diameters, as most of the pipes in use are round. To determine the area of the inner cross-section of the pipe, first divide the diameter by two in order to find the radius. The area of a circle is equal to pi x radius x radius. Multiplying the area by the velocity of the water yields the volume of water flow per unit of time.

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To perform a simple flow calculation, multiply the flow area by the flow velocity to determine the flow rate. Ensure that the units of length are consistent when performing calculations. If, for example, the flow area is measured in square meters, the flow rate should be expressed in meters per second. To determine flow rate based on the capacity of a tank as it fills, divide the capacity of fluid stored by the time storage takes.