# >> College & Higher Education >> College

How to Calculate Exit Gas Velocity

The velocity of a gas exiting an object is the actual flow rate of the gas affected by the dimensions of the route through which it is leaving. Common routes include rectangular vents and circular stacks. The shape of the route doesn't matter as much as its area, since the greater the area, the quicker the gas can move through it. The flow rate of the gas depends on the individual gas and its temperature.

Calculator

Instructions

- 1
  Determine the measurements of the route. For example, assume the route is a duct that has the dimensions of 2.5 feet by 4 feet.
- 2
  Calculate the area of the route. In this example, 2.5 feet multiplied by 4 feet equals 10 feet squared.
- 3
  Divide the gas flow rate by the area. For this example, the gas flow rate is 25,000 ACFM, which is actual cubic feet per minute. Dividing 25,000 cubic feet per minute by 10 square feet results in 2,500 feet per minute.

List of Reformed Seminaries

Importance of Extrinsic Motivation