This is a handy tool when deciding what size duct you want to use for your application.
Convert round duct to rectangular calculator.
Other hart cooley mobile tools.
The table is based on the ducts friction loss formula.
Read computed values for equivalent round duct diameter inches.
Sheet metal duct friction loss calculator.
Enter the length inches and width inches of the rectangular duct.
The area will cover a two dimensional slice of the duct.
Convert rectangular duct to round equivalent.
Include fittings in the duct tel enter either.
Convert rectangular and oval duct geometry to a equivalent circular diameter online calculator with imperial and si units sponsored links the equivalent diameter is the diameter of a circular duct or pipe that for equal flow gives the same pressure loss or resistance as an equivalent rectangular duct or pipe.
Convert diameter to rectangular equivalent.
Friction loss calculator for flexible ducts.
Step 5 select a size of square duct that has the same area.
Equivalent duct calculator round vs rectangular.
I want to calculate.
Duct areas in square feet can be calculated by using geometry rules for round areas.
The rectangular dimensions and the air flow volume are adapted to the equal friction loss.
D e is the circular equivalent of rectangular duct for equal length fluid resistance and airflow inch a is the length of one side of duct inch b is the length adjacent side of duct inch.
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.
The table below can be used to compare equivalent diameters for rectangular and round circular ducts.
This can be found by multiplying the two adjacent sides of the rectangular duct.
To then convert that to volume you multiply the resulting area by the length.
Friction loss calculator for sheet metal ducts.
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.
Diameter of a round duct that equates to the same pressure loss as the corresponding rectangular duct.
Convert round duct size to rectangular duct size for equivelant airflow.
Equivalent duct calculator app user guide appendix equivalent round for rectangular 𝐷𝑒 1 30 0 625 0 250 where.
