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A simple Pipe Air Velocity Calculator that helps you find air speed in pipes fast. Easy, clear, and perfect for metric and imperial units.
Air moves through pipes in many places. You see it in HVAC ducts, shop air lines, and blower systems. It may look simple, but you still need the right air speed. That’s where our Pipe Air Velocity Calculator helps you. It gives you quick and clear results. You don’t need deep math skills. You enter your flow rate and the pipe size. The tool does the rest.
This guide explains how the calculator works. You’ll see the formula in plain text. You’ll learn how to use the tool. You’ll also get clear tips and simple examples.
Pipe air velocity means how fast air moves through a pipe. You can think of it like water in a hose. A small hose makes the water move fast. A large hose slows it down. Air works the same way.
This is why techs and engineers check air speed. It helps them set safe flow rates. It helps avoid noise, loss, or pressure drop.
Airflow math feels tricky. Units change fast. Flow rate might be in ft³/min or m³/h. Pipe size might be in inches or mm. If you mix things up, the result is wrong.
Our calculator fixes that. It uses metric and imperial units. It converts all inputs for you. You get clean and correct air velocity in seconds.
The calculator follows a simple physics rule. Air speed comes from flow rate and pipe area. The pipe area comes from the pipe diameter.
Here’s the core formula in clear text:
Velocity = Flow Rate ÷ Pipe Area
Pipe Area = π × Diameter² ÷ 4
You can join them like this:
Velocity = 4 × Flow Rate ÷ (π × Diameter²)
That’s the full formula. The tool applies it with the right units.
It’s very easy. Anyone can do it.
You’ll see the air velocity at once. The tool also shows each step. This helps you learn the math fast.
If you want the reverse, choose Flow Rate Mode. Then enter velocity and pipe size. The tool returns the airflow.
Let’s explain the formula in a simple way.
When you blow air through a big pipe, the speed drops. When the pipe is small, the speed rises. Why? The same air has to pass through a smaller hole. It’s like pinching a garden hose.
Flow rate tells you how much air moves. Pipe area tells you how much space the air gets. So speed is just flow moved through space.
That’s why the formula stays simple.
Speed grows when flow grows.
Speed slows when the pipe gets larger.
Some tools make metric math hard. Ours doesn’t. You can pick m³/s, L/s, m/s, mm, cm, or meters. The logic stays the same. The tool converts everything to the base SI values and gives clean results.
This makes it a great pipe air velocity calculator metric for global users.
Say you have a shop air line. The flow rate is 120 ft³/min. The pipe is 1 inch wide. You want to know the air speed.
You enter:
Flow Rate: 120 ft³/min
Pipe Size: 1 in
Unit: ft/s
The calculator runs the math and shows the answer. You’ll also see each step so you can follow the process.
This Pipe Air Velocity Calculator makes airflow math feel easy. You don’t need complex charts or long formulas. You just enter your values and get fast results. It works for HVAC ducts, blower pipes, air compressors, and more. It’s simple, clean, and ready for real work. If you want the metric version, you’re covered too.
You can use ft³/min, m³/s, m³/h, L/s, ft/s, m/s, inches, mm, and many more.
Yes. It follows standard fluid flow math used in HVAC and engineering.
Yes, if the gas is at low speed. The formula works for low-compressible flow.
Yes. A small pipe makes air move fast. A large pipe slows it down.
No. The tool does all unit conversion for you.