Enter the density of the fluid, flow velocity, and cross-sectional flow area into the calculator to determine the mass flow rate of the fluid.

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## Mass Flow Rate Formula

The follow formula is used to calculate the mass flow rate of any in-compressible fluid.

m = p * V * A

- Where m is the mass flow rate kg/s
- p is the density of the fluid in kg/m^3
- A is the cross sectional area m^2
- V is the flow velocity in m/s

## Mass Flow Rate Definition

A mass flow rate is defined as the total mass of a fluid or substance that moves through a given cross-sectional area per unit of time.

## Mass Flow Rate Example

How to calculate mass flow rate?

**First, determine the density of the fluid.**Measure the density of the fluid.

**Next, determine the cross sectional area.**Calculate the cross sectional area the fluid is moving through.

**Next, determine the velocity.**Measure the velocity of the fluid.

**Finally, calculate the mass flow rate.**Use the formula above to calculate the mass flow rate.

## FAQ

**What is mass flow rate?**

Mass flow rate is the total amount of mass of fluid that flows through an area per any given time sample. Most often it’s measured in kg per second.

**How is mass flow rate calculated?**

Mass flow rate is calculated through the density, flow speed, and cross sectional flow area.