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