Online Ductulator

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Duct type:   Metal      Ductboard      Flex

Size by:   Friction rate      Velocity

Friction Rate: per 100 ft.   in/wg

Duct TEL :  ft.   * include fittings in the Duct TEL

Enter either:   CFM:   or      Duct Size:     

CFM:






Convert Rectangular duct to Round Equivalent

Side 1: inches           Side 2: inches



Diameter: 

Convert Diameter to Rectangular Equivalent

Diameter: inches           Side 1: inches



Second side: