My Balsa & Glass Workshop documents scratch-built balsa radio-controlled models and workshop projects.
eCalc
eCalc simulates electric drives for radio-controlled models and helps users select motors and components.
About eCalc
eCalc is a web-based calculator for simulating electric drives in radio-controlled (RC) models. It is used to select motors and components and to check a setup before it is built or flown. The site covers airplanes, multirotors, helicopters, EDF jets and propellers, and also includes tools for electric vehicles and charging.
The site's motor database is updated regularly, and its homepage lists monthly additions. The full tool set requires membership. A free demo is available with reduced functionality and a 20% random subset of the database. The homepage describes the interface as available in 19 languages, but some of the linked published articles are German only.
Key features
- Electric drive simulation for RC airplanes, multirotors, helicopters and EDF jets
- Propeller performance and blade calculation tools
- Center of gravity calculator for airplanes with up to five wing panels
- Motor database with regular updates listed on the homepage
- Battery true C-rating calculation
- Servo torque calculation for control surface moments
- Tools for electric vehicle range and charging comparison
Best for: Hobbyists and small teams planning electric RC aircraft, multirotors or helicopters who want to check motor and propeller choices before buying.
Good for
- Membership includes over 15,000 predefined components, according to the homepage.
- Covers several model types, from airplanes and helicopters to multirotors and EDF jets.
- Interface is listed in 19 languages.
Watch out for
- The free demo has reduced functionality and uses a 20% random subset of the database.
- Several published articles are available in German only.
- Commercial and university use requires a quote on request.
eCalc at a glance
- Website
- ecalc.ch
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
eCalc alternatives
Tools and sites you could use instead, ranked by how closely they match.
PicaSim simulates flight for radio-controlled aircraft, with gliders and other aircraft types listed among its repository topics.
RCPlanes Online offers a beginner's guide to basic aerodynamics and information for radio-controlled aircraft hobbyists.
PicaSim provides information, media, and downloads for a radio-controlled flight simulator.
ThrustCurve provides model and high-power hobby rocket motor data, including manufacturer specifications and certified performance.
The LAMMPS software simulates classical molecular dynamics, with a focus on materials modeling.
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eCalc FAQ
Is there a free version of eCalc?
A restricted demo version is free. It has reduced functionality and a 20% random subset of the database. Full functionality and the complete set of predefined components require membership.
Is eCalc available for commercial or university use?
The homepage lists a Teams & Campus option for UAV/VTOL teams and courses or labs. Pricing for this option is by quote on request.
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