TachCalc 4+


Designed for iPad

    • 3.0 • 2 Ratings
    • $2.99



Save fuel and money by leaning your fixed prop engine at cruise – regardless of altitude – easily with PilotGEEK's TachCalc. Aircraft POH's recommend leaning above 5000 feet to protect the engine from damage. TachCalc lets you quickly and easily calculate your target RPM for the power setting desired for your current altitude.

And TachCalc simplifies your fixed prop flight planning by allowing you to determine both the best power setting for cruise at your selected altitude and the TAS to file.

> Improved user interface. Adjust Indicated altitude, Altimeter setting, Outside air temperature and % power utilizing:
o Self-centering sliders
o Direct keyboard entry
o Customizable display units
- Altitude: Feet or Meters MSL
- Altimeter Setting: inHg, mmHg, mBar, hPa
- Temperature: ºC or ºF
- Speed: Kts, MPH, KPH
- Fuel Flow: usGPH, impGPH, LPH
> Calculates and displays
o Engine speed for desired % power
o Pressure Altitude
o Density Altitude
o Indicated Airspeed
o True Airspeed
o Fuel burn at best economy (maximum lean)
> Supports fixed pitch propeller aircraft
> 27 aircraft profiles included (see web page for details)
> Aircraft profiles can be edited to match plane's POH
> User defined aircraft profiles

What’s New

Version 2.1

Release 2.1 of TachCalc now supports 27 aircraft profiles including Beech Musketeer, Robin DR400 and additional Cessna C172 and Piper PA28 models.

Also fixed a minor defect when displaying temperature in degrees Fahrenheit where the initial temperature was shown as 9F (the standard temp for Centigrade) instead of 43F (the standard temperature for Fahrenheit) at 4500 MSL.

Please email developer at tnery@pilotgeek.com with enhancement or additional standard profile requests.

Ratings and Reviews

3.0 out of 5
2 Ratings

2 Ratings

Adasdsdvv ,

Not supported. Only 180C in database.

Does not work. Not supported. No one to contact. Don't waste your money.

Skymonger ,


There is no way to apply it to moremthan one model plane or engine

App Privacy

The developer, PilotGEEK, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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