Construction calculators » Water, air, gas speed calculation online

Calculate the speed of water, air, gas in pipes

Select cross-section:
Cross-section width: mm
Flow rate:


We present to you an online calculator for calculating the velocity of water, air, and gas in pipelines and duct systems. This tool is designed for engineers, designers, and construction professionals, allowing for quick and accurate calculations of essential parameters for water supply systems, ventilation, and gas pipelines.

Advantages of the calculator:

  • Supports various types of pipeline and duct sections (round, rectangular).
  • Allows specification of cross-sectional parameters for precise calculations.
  • Choice of flow rate units: m3/h or l/s.
  • Fast and accurate online flow velocity calculation.

How to use the calculator:

  1. Select the cross-sectional shape of the pipeline or duct.
  2. Enter the cross-sectional parameters (e.g., diameter for round pipes or width and height for rectangular ones).
  3. Specify the flow rate of the liquid, air, or gas in the selected units of measurement.
  4. Click the "Calculate" button to obtain the flow velocity.

Accurate calculation of water, air, and gas velocity in pipelines and ducts is critically important for the efficient design of engineering systems. Proper flow velocity selection helps prevent excessive pressure, noise, and vibrations, while also ensuring optimal equipment performance.

Our calculator is designed in accordance with international standards and can be used in various fields of construction and engineering, including heating, ventilation, and air conditioning (HVAC) systems, water supply, and gas distribution.

By using this tool, you can optimize the sizes of pipes and ducts, reduce material costs, and increase the reliability of your projects. With its intuitive interface and online operation, the calculator is suitable for both professionals and technical students.

If you found our online calculator useful, please share it with your colleagues and friends. We are committed to making design processes simpler and more efficient for specialists around the world.