Rectangular to equivalent circular duct calculator.
Rectangular to round duct calculator.
The equivalent diameter of a 300 mm x 500 mm rectangular duct can be calculated as.
Indicates required field rectangular width.
This can be found by multiplying the two adjacent sides of the rectangular duct.
Read round duct diameter inches and friction loss per 100 of duct inches of water.
The calculator below is based on formula 1.
In this example the area is 314 square inches.
Multiply the square of the radius by 3 14 to get the area of the duct in square inches.
Step 5 divide the area from step 4 by 144 to get the area in square feet.
Convert rectangular duct to round equivalent.
Friction loss calculator for flexible ducts.
Equivalent duct calculator round vs rectangular.
The table is based on the ducts friction loss formula.
Step 5 select a size of square duct that has the same area.
Include fittings in the duct tel enter either.
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.
I want to calculate.
The table below can be used to compare equivalent diameters for rectangular and round circular ducts.
Other hart cooley mobile tools.
The rectangular dimensions and the air flow volume are adapted to the equal friction loss.
Converts a rectangular size to the appropriate round size or the available esm flat oval size.
Friction loss calculator for sheet metal ducts.
Convert round duct size to rectangular duct size for equivelant airflow.
The formula is generic and any unit can be used.
D e 1 30 300 mm 500 mm 0 625 300 mm 500 mm 0 25 420 mm.
This online air duct calculator is used to calculate the velocity of air flow feet per minute fpm and feet per second fps through any shaped circle square or rectangle ductulator with either diameter sides or area.
This is a handy tool when deciding what size duct you want to use for your application.
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.
Sheet metal duct friction loss calculator.
