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

 news - November 14th

11/14/18 - Motor Database Updated: new Leomotion LEO

11/7/18 - evCalc 2.11: now with build in route designer and additional BMS value (very high) for cold soaked batteries

10/24/18 - Motor Database Updated: Leomotion LEO 2303, Esprit Model E105 Series

10/20/18 - Motor Database Updated: ProTronik 36xx Series
EV Car Database Updated: Tesla Model 3 Mid Range

10/11/18 - EV Car Database Updated: e.Go Life added

10/2/18 - Motor Database Updated: Leomotion L80xx V2 added
EV Car Database Updated: BMW i3 / i3s with 120Ah Battery, Kia e-Nero renamed

6/3/18 - xcopterCalc: no more calculation resriction for Race Copter with a propeller diameter of 6.5" or less. However, hover accuracy byond a Diameter-Pitch-Ratio of more than 0.667 decreases.

5/27/18 - eCalc welcomes the 7 millonst visitor!

5/18/18 - evCalc final Version 1.00  - the first independent Range Estimator for cross branded electic cars.

5/18/18 - new eCalc Version 7.11 available - What's new?

  • Service update: Compliance with GDPR
  • xcopterCalc: Range Graph bug corrected
  • New language: romanian
  • and more...
If you have problems to run the new version, please proceed according the General Procedure here...


2/7/17 - cgCalc Version 1.11 released (optimized tail calculation) - to cgCalc

1/22/18 - eCalc is selected to be DRONE MARKET PROFESSIONAL 2018 for it's leading role on the Drone Market.

✓ Reliable Predictions since 2004
✓ calculating mot than 15'000 setups a day

Sign-up now and get instantly full access!
membership starts from $0.99 only - Summer Specials

Choose your Calculator

propCalc for fixed wing aircraftfor Airplane
propCalc for fixed wing aircraftfor Airplane
xcopterCalc for multicopter and drone calculationfor Multirotor
heliCalc for helicoopter calculationfor Helicopter
fanCalc for electric jet calculationfor EDF Jets
torqueCalc for industrial designfor industry

available in 17 languages: 中文, čeština, deutsch, english, espaņol, franįais, hrvatski, italiano, 日本語, 한국어, Nederlands, فارسی, polski, portuguęs, русский, românesc, svenska, türk

System Status:  normal 


The restricted Demoversion with reduced functionality and 20% random database is for free. Sign-up now and become an eCalc Member today with instant access to the full funcionality and over 9400 predefined components.

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

evCalc − #rEVolution

very first multi-brand EV Range Simulation
evCalc for electric cars for all brands of electric cars


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

  • Explanatory videos on eCalc YouTube Channel and published articles (see below).
  • 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: static evaluation with some easy measurments on the table. dynamic decalage correction based on out of neutral trim.
  • 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, Facebook Group eCalc or the eCalc YouTube Channel 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...

You are a motor manufacurer?
Please send us your specifications or fill in this form and we will update our database with your motors. Thereafter all visitors may use your motors for calculation. This will increase your visibility on the market considerable.

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.

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