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Airflow Conversion
Airflow Conversion
Airflow Unit Conversion
Enter the air velocity or volume airflow and the duct area, then select the appropriate units.
Clicking the calculate button without input will load the example below. Calculations are approximate.
Velocity Units
Volume Airflow Units
Airflow Value
LFM
m/s
MPH
CFM
m^3/hr
L/s
ft/min (LFM)
m/s
miles/hr (MPH)
ft
3
/min (CFM)
m
3
/hr
L/s
Choose circular tubing or rectangular piping and type the required dimension(s), then select the appropriate units.
h
w
in
ft
mm
cm
m
r
in
ft
mm
cm
m
Example
Using the airflow calculator above, type the airflow value of
400
and select
LFM
as the units. Next type the circular duct dimensions of
r = 2 in
. After pressing the
Calculate Airflow
button, read the CFM requirement of 34.91 CFM in the volume airflow units column.
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