Step 5 select a size of square duct that has the same area.
Rectangular to round duct calculator.
I want to calculate.
Air duct also termed as ductulator is a passage that is used to provide fresh air into rooms buildings etc air ducts may be in circular square and in rectangular shapes.
Convert round duct size to rectangular duct size for equivelant airflow.
The equivalent diameter of a 300 mm x 500 mm rectangular duct can be calculated as.
This is a handy tool when deciding what size duct you want to use for your application.
Multiply the square of the radius by 3 14 to get the area of the duct in square inches.
Enter duct airflow cfm duct velocity fpm duct length and the number of bends.
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.
Read round duct diameter inches and friction loss per 100 of duct inches of water.
Friction loss calculator for flexible ducts.
Sheet metal duct friction loss calculator.
The table below can be used to compare equivalent diameters for rectangular and round circular ducts.
The rectangular dimensions and the air flow volume are adapted to the equal friction loss.
Other hart cooley mobile tools.
D e 1 30 300 mm 500 mm 0 625 300 mm 500 mm 0 25 420 mm.
Convert diameter to rectangular equivalent.
The calculator below is based on formula 1.
This can be found by multiplying the two adjacent sides of the rectangular duct.
Indicates required field rectangular width.
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.
Rectangular to equivalent circular duct calculator.
Include fittings in the duct tel enter either.
The table is based on the ducts friction loss formula.
Convert rectangular duct to round equivalent.
Equivalent duct calculator round vs rectangular.
Step 5 divide the area from step 4 by 144 to get the area in square feet.
Friction loss calculator for sheet metal ducts.
The formula is generic and any unit can be used.
