Heat power calculator

Thermal energy calculator

online since 2006

Choose Your Preferred Way to Calculate

Online Calculator

Access anywhere. No install needed.

Free Limited Version
$0.00 /year
🌐 Use Online

Windows App

Offline full-featured version.

Free Trial Available
$29.95 /year
⬇️ Download for Windows

When is this calculator suitable?

This calculator is very easy to use and also very handy at the same time. You can resolve basic heat power requirement tasks in a few seconds.

You can use the calculator for hot water boilers, water and air heat exchangers, hot water radiators, water chillers, air heaters, and other heat power generation and consumption units.

What has to be known for a calculation?

You can select between two calculation scenarios. The first is heat power calculation, and the other one is the flow rate calculation.

In both scenarios, you have to insert the specific heat of a fluid as well as temperatures on the start and the end of the heat exchanger.

You can also select between volume and mass flow rate, for a known density of the fluid. The calculator displays the velocity of the fluid for entered pipe internal diameter.

Desktop App

Professional-grade pipe flow calculations
Fast. Accurate. Reliable.
Free Trial Available
As low as $29.95 /year
Download Now

Features in desktop app

  • Save/Open multiple results
  • Export to Word and Excel
  • Print results
  • Create list of custom fluid properties
  • Resistance factor K for valves/fittings
  • Pipe surface roughness selection
  • Pipe material selection
  • Gauge vs absolute pressure toggle
  • Compressible isothermal flow
  • Dry air isothermal flow
  • Gas offtake flow
  • Natural gas flow
  • No admin rights required to install

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