Ekalk
ekalk.euIntroduction
Ekalk is a comprehensive online calculator collection developed independently by Polish developer Sławomir Wernikowski, designed for electronic engineers, hardware hobbyists, and amateur radio operators (Hams). The tool provides over 40 interactive calculators for electronic design, hobbyists, and amateur radio enthusiasts, covering core functions such as basic circuit calculations, coil and antenna design, component identification and conversion, and common electronic formulas and conversions. Specific features include: parallel resistor, series capacitor, parallel inductor, LC resonant circuit calculations; single-layer air-core coil, circular/square loop coil, parabolic antenna gain and line-of-sight propagation calculations; resistor color codes (4/5 band), 3-digit capacitor marking, inductor color codes, AWG wire gauge conversion and standard value matching (E6-E192 series); Ohm's law, 555 timer circuits (astable/monostable), LM317 regulator, dBm/mW conversion, Y-Δ transformation and voltage drop calculations. The tool is completely free to use, suitable for electronic circuit design and theoretical calculations, component selection and parameter matching, preliminary design and parameter estimation of antennas and coils, unit conversion and basic law verification in electronic engineering, and as an auxiliary learning tool for amateur radio enthusiasts or students.
Features
- 40+ electronic calculators
- Basic circuit calculations (resistor/capacitor/inductor)
- Coil and antenna design functions
- Component identification and conversion (color codes/AWG/standard values)
- Common electronic formulas and conversions (Ohm's law/555 timer/LM317)
- Designed for electronic engineers and amateur radio enthusiasts