# Air Velocity Calculator, Formula, Air Velocity Calculation

## Air Velocity Calculator:

Enter the values of Air Flow Rate AFR(ft3/s) & Air Duct Area DA(ft2)  to determine the value of Air Velocity Vair(ft/s) .

 Enter Air Flow Rate: ft3/s Enter Air Duct Area: ft2 Result – Air Velocity: ft/s

## Air Velocity Formula:

The Air Velocity Vair(ft/s) in feet per second is equal to the Air Flow Rate AFR(ft3/s) in feet cube per second is divided by the Air Duct Area DA(ft2) in feet square.

The Equation of Air Velocity can be writtern as,

Vair(ft/s) = AFR(ft3/s) / DA(ft2)

Here,

Vair(ft/s) = Air Velocity in feet per second

AFR(ft3/s) = Air Flow Rate in feet cube per second

DA(ft2) = Air Duct Area in feet square

### Calculation for Air Velocity:

1)Determine the Air Velocity and given for Air Flow Rate = 100 ft3/2 , Air Duct Area = 10 ft2.

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Answer

Vair = AFR / DA

Vair = 100 / 10

Vair = 10ft/s.

2)Determine the Air Duct Area and given for Air Flow Rate = 100 ft3/2 , Air Velocity = 10ft/s.

Answer

Vair = AFR / DA

10 = 100 / DA

DA = 10ft2.