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# Mass flow rate

Mass flow rate is the movement of mass per time. Its unit is mass divided by time - kilogram per second in SI units, and slug per second or pound per second in US customary units.

### Additional recommended knowledge

Mass flow rate can be calculated from the density of the liquid (or gas), its velocity, and the cross sectional area of flow.

${\dot m}$ = ${\rho \cdot V\cdot A}$

where:

${\dot m}$ = mass flow rate
ρ = density
V = velocity
A = flow area

The mass flow rate can also be calculated by multiplying the volume flow rate by the density.

${\dot m}$ = ${\rho \cdot Q}$

where:

ρ = density
Q = volume flow rate

## See also

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Mass_flow_rate". A list of authors is available in Wikipedia.
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