News
The Heat Loss app has been updated, adding a function has been added to insert rooms from an image file with a schedule.
13.06.2026
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A version of the HVAC Calculator has been created for mobile browsers on Android and iOS.
09.01.2026
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All online applications have been updated and now have a dark theme.
04.01.2026
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The designer often needs to perform a variety of small calculations.

This collection of calculations will help you to do it. It is a kind of designer's Swiss army knife that is always at hand and will help you out in any situation.

The application can work both in a desktop and in a mobile browser on Android and iOS.
Various sections, 85 calculations
  • Aerodynamics.
  • Hydraulics.
  • Heating.
  • Ventilation.
  • Air properties.
  • Fluid properties.
  • Engineering geometry.
Formulas
Browse the formulas used in calculations.
User-friendly calculation tools
  • Do the quick calculation selection by means of navigation at calculations sections.
  • Carry out single or comlex calculations by means of links between the calculations.
  • Get the calculations table with given data and results.
  • Add, copy, change, delete, or move calculations.
  • Save the summary table as an Excel file.
  • Save and load calculation results from the cloud or a file.
Video review
Just watch video and start working.