eCalc - electric drive simulation and calculation - the most reliable RC Calculator on the Web

 news - December 1st

12/1/16 - Motor database updated witn Dualsky GA-Series (2nd Generation)

11/28/16 - Prop database updated: Master Airscrew E, GF, Scimitar added

11/26/16 - Motor database updated: TGY Multistar Viking and others

11/18/16 - Wondering your center of gravity (CG) is correct for your next maiden flight? Verify or evaluate your CG with our new toolbox service cgCalc...

10/2/16 - the new wingDesigner4 in the Toolbox below evaluates and visualizes the center of gravitiy (CG) of more complex wing designs.

9/15/16 - new eCalc Version 6.71 available - What's new?
  - Remarks are color coded (blue: info / red: critical)
  - xcopterCalc: new Range Estimator
  - propCalc - easy: Beta Version for smart phones
  - and more...
If you have problems to run the new version, please proceed according the General Procedure here...

We apprecite your scan's of any article about eCalc you read in your prefered RC Magazine - info[at]


The restricted Demoversion with reduced functionality and 25% random database is for free. Sign-up now and become an eCalc Member today with instant access to the full funcionality and over 7000 predefined components.


These tools may further support you by calculating RC-related tasks:

  • cgCalc: Calculate, evaluate or verify the Center of Gravity (CG), Neutral Point (NP) and Aerodynamic Center (AC) of your airplan before maiden. The only CG Calculator for upto 5 wing panels.
  • control surface moment: calculate the required torque of your servo.
  • decalage: evaluation with some easy measurments on the table.
  • TRUE C Rating: calculate the true perfomance of your battery.
  •  wingDesigner4: evaluate and vizualize the center of gravity (CG) of complex wing
  • wingDesigner: evaluate and vizualize the center of gravity (CG) of your wing
  • xcopterDesigner: optimise and visualises your copter design.

about eCalc - drive calculator

Since 2004 eCalc provides web-based quality services to simulate, calculate, evaluate and design electric brushless motor drives for RC pilots of airplane, multi rotor, UAV, helicopter and EDF jets.
eCalc's motor database is the most comprehensive on the web.

Follow us on Twitter @eCalc_e  or on Facebook Group eCalc to get the latest news.

Is my Motor available?
Wondering your motor is in the Database? ...check the full motor list. If you motor is missung just provide us with the specifications...

Did you find a bug or data error?
please report to info[at] with detailed discription and screen shot - Thank you.

Missing your Language?
We are looking for experienced RC Pilots willing to translate eCalc from english or german to any other language. Please contact us info[at]

terms & conditions

The private use is granted without restrictions. The copyright applies.

The commercial use without any contract with Solution for All Markus Mueller is expressly prohibited. For the contracted  commercial users the Terms & Conditions applies. 

Interested in a commercial use? Please contact us by email: info[at]

copyright & author's right

All source codes, data, texts, pictures and graphs and their arrangements are subject to copyright and are the intellectual property of Solution for All Markus Mueller. They may neither be copied for forwarding nor used in an amended form or on other websites or servers or any kind of electronic device.

© by Solution for All Markus Müller  -  -  info[at]