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Calculate stack exit velocity instantly with our free Stack Exit Velocity Calculator. Easy inputs, clear steps, and accurate results.
A stack exit velocity calculator helps you find how fast air or gas leaves a stack. It is simple to use. You only need flow rate and stack size. We built this tool to save your time. You do not need formulas or manuals. Just enter values and get results in seconds.
Stack exit velocity matters in many fields. Engineers use it often. HVAC teams rely on it. Environmental studies also need it. Our calculator makes this task easy for everyone.
Stack exit velocity means the speed of gas at the stack opening. It shows how fast air exits a chimney or vent. The value depends on two things. One is airflow. The other is stack diameter.
If airflow increases, velocity increases. If the stack gets wider, velocity drops. This simple idea drives the whole calculation.
Stack exit velocity is usually measured in feet per minute. Other units also work. Our calculator supports many units.
Stack exit velocity affects air dispersion. Low speed can cause poor mixing. High speed helps gases spread faster. This helps reduce ground-level pollution.
HVAC systems also depend on it. Proper velocity keeps systems efficient. It also prevents backflow problems. That is why accurate calculation matters.
The stack exit velocity formula is based on flow and area.
Stack Exit Velocity equals volumetric flow rate divided by stack area.
the formula is:
SEV = VFR / (pi × D squared / 4)
Here, VFR means volumetric flow rate.
D means stack diameter.
Pi is a fixed number close to 3.1416.
The area comes from the circle shape of the stack. Once you know the area, the rest is easy.
Our calculator handles all math for you.
We designed this calculator for real users. You do not need technical skills. You just enter values.
You also see step-by-step results. This helps you learn while you calculate.
Using our calculator feels simple.
You get the answer at once. You also see clear steps. This helps you trust the result.
It works well on mobile and desktop.
Assume airflow is 300 cubic feet per minute.
Assume stack diameter is 4 feet.
The calculator finds the area first.
Then it divides flow by area.
You get stack exit velocity in feet per minute.
No manual math needed. The tool does it all.
Our Stack Exit Velocity Calculator makes life easy. It removes guesswork. It saves time. It shows clear steps.
We built it for speed and accuracy. Anyone can use it. No math skills needed.
If you need quick and correct stack exit velocity, this tool is ready.
It supports ft per minute, ft per second, meters per second, km per hour, and more. Flow and diameter units also convert automatically.
No. Stack exit velocity measures speed. AGL measures height. They are different values.
Stacks are round. Pi helps find the area of a circle. That area is needed for velocity.
Yes. Our stack exit velocity calculator is fully free to use.
Yes. The calculator uses the standard engineering formula. It matches real-world use.