Q=VA Flow Rate Calculator 
Compute flow rate from velocity and area 

Units in flow rate calculator: You may enter numbers in any units, so long as you are consistent. (L) means that the variable has units of length (e.g. meters). (L^{3}/T) means that the variable has units of cubic length per time (e.g. m^{3}/s). Flow rate equation: Q = VA. If circular, then A = π D^{2} / 4 The flow rate calculation does not check for unreasonable inputs such as negative values. All values should be entered as positive.
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