To then convert that to volume you multiply the resulting area by the length.
Square to circular duct.
I want to calculate.
The table below can be used to compare equivalent diameters for rectangular and round circular ducts.
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Step 5 select a size of square duct that has the same area.
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The equivalent diameter is the diameter of a circular duct or pipe that gives the same pressure loss as an equivalent rectangular duct or pipe.
20 in x 25 in x 16 in duct square to round.
For example if you found a duct that measured 10 inches by 5 inches.
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4 7 out of 5.
Friction loss calculator for sheet metal ducts.
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Friction loss calculator for flexible ducts.
The rectangular dimensions and the air flow volume are adapted to the equal friction loss.
Duct areas in square feet can be calculated by using geometry rules for round areas.
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Round metal duct pipe model bcp6x24 4 98 4 98.
26 gauge round metal duct pipe model 26cp4x24 5 67 5 67.
Imperial 6 in x 60 in galvanized steel round duct pipe.
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The area will cover a two dimensional slice of the duct.
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Imperial 4 in x 4 in galvanized steel round duct elbow.
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Equivalent duct calculator round vs rectangular.
Multiply this number by 3 14 pi to get the area of the round duct in square inches for example 16 x 3 14 50 24 square inches.
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Learn the differences between round and rectangular air ducts from our commercial hvac pros.
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The table is based on the ducts friction loss formula.
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