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Air flow calculator

Related calculators: Gas flow; Gas discharge

Pipe flow calculator features

  • Pack of sixteen pipe flow calculators in one application
  • Productive tool for every day flow calculations
  • Used by thousands of engineers, students, professors and other professionals every day
  • Multiple calculation scenarios for each calculator
  • Easy switch between metric and imperial units
  • Copy and save calculation results
  • Every calculator is backed with used theory and equations
  • Always use the latest version with automatic update
  • Stay connected with developer and community through social channels



Java Runtime Environment – JRE version 1.8+
(install latest JRE now)

OR without Java
Download and run calculators pack - for Windows64bit users only.

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Read detailed instructions and requirements

Calculators for download in one pack, Java required.
For desktop/laptop users (Windows, MacOS, Linux)

download and start
*no administrator's roles required

No Java? It's a shame…
BUT it's not the end of the word!

If you are having Windows 64bit on your computer you can download and run calculators even without administrator role on your computer. This kind of calculator deployment is great if you are on the corporate network and if you don't have authority to install anything on your computer.

If you are not Windows 64bit user you can still use some calculators on my other web site at pipeflowcalculations.net .
There you can try server side, mobile friendly, pipe flow calculators that require nothing more than a web browser and Internet connection

Air is used for many applications in the industry. Compressible air flow and pressure drop calculator can be used for air flow through round closed pipe. Pressure drop or flow rate can be calculated, as temperature is considered to be constant.

Compressible air flow calculator can be used for both laminar and turbulent flow. It can calculate pressure drop or flow rate through a pipe including friction losses and local pressure losses calculation.

Compressible air flow calculation is based on the pressure drop equation in isothermal flow. Pressure losses calculation due to friction are using friction factor values and pressure losses due to local resistances like fittings and valves are using resistance coefficient K values. Flow mean velocity for known flow rate and pipe diameter is also used in calculator. Values of Reynolds number and flow regime - laminar or turbulent are also presented. Pressure difference due to change of height is not included in this version of calculator.

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