Q=VA Flow Rate Calculator

Compute flow rate from velocity and area

  
 

 

Ducts, Pipes, and Culverts: 
Flowing Full or Partially Full:  Diameter, D (L): 
Compute Q from V and A Area, A (L2): 
Compute V from Q and A Velocity, V (L/T): 
Compute A from V and Q Flow Rate, Q (L3/T): 
Flowing Full:  © 2014 LMNO Engineering,
Compute Q from V and D Research, and Software, Ltd.
Compute V from Q and D http://www.LMNOeng.com
   

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). (L3/T) means that the variable has units of cubic length per time (e.g. m3/s).

Flow rate equation: Q = VA. If circular, then A = π D2 / 4

The flow rate calculation does not check for unreasonable inputs such as negative values. All values should be entered as positive.

 

© 1998-2023 LMNO Engineering, Research, and Software, Ltd.  All rights reserved.

Please contact us for consulting or questions about flow rate, velocity, and area equations.

LMNO Engineering, Research, and Software, Ltd.
7860 Angel Ridge Rd.   Athens, Ohio 45701  USA   Phone: (740) 707-2614
LMNO@LMNOeng.com    https://www.LMNOeng.com

 

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