Minor Loss Calculation for Liquids and Gases

Minor loss due to fittings in pipes and open channels



Select units: 
Minor Loss Coefficient, K: 
© 2014 LMNO Engineering, Velocity, V (ft/s): 
Research, and Software, Ltd. Minor Loss, hm (ft): 

Units in minor loss calculator: ft=foot, m=meter, s=second.

Minor Loss Equation:

Minor Loss Equation

g = acceleration due to gravity = 32.174 ft/s2 = 9.806 m/s2.

hm = head loss due to a fitting and has units of ft or m of fluid. It is the energy loss due to a fitting per unit weight of fluid.

K = minor loss coefficient for valves, bends, tees, and other fittings - table of minor loss coefficients.

The minor loss calculation is valid for open channels (including partially full culverts) as well as closed conduits (circular or non-circular) flowing full. The minor loss calculation does not check for unreasonable inputs such as negative values. All values should be entered as positive.


© 1998-2024 LMNO Engineering, Research, and Software, Ltd.  All rights reserved.

Please contact us for consulting or questions about minor losses.

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


LMNO Engineering home page (more calculations)  

Minor Loss Coefficients (K)

Q=VA simple flowrate calculation

Unit Conversions

Other information:


Discussion and References