This page contains various javascript based calculators for electronics.
- Slim Jim and J-Pole antenna calculator – Build a cactus for any frequency.
- 1/4 Wave Ground Plane antenna calculator – Build a simple quarter wave with radials.
- Ω Ohm’s Law Calculator Ω – Enter 2 values from Voltage, Current, Power or Resistance, to find the remaining two.
- dBm, dBW, µW, mW, W, kW and MW calculator – Calculate between dBm, dBW, µW, mW, Watts, Kilowatts and Megawatts.
- ERP & EIRP Calculator – Calculate effective radiated power from your antenna.
- Resonant Frequency Calculator – Calculate the resonant frequency of a parallel inductor and capacitor tuned circuit.
- PI attenuator calculator – Calculate the resistor values for a PI attenuator.
- T attenuator calculator – Calculate the resistor values for a T attenuator.
- Air cored inductor calculator – Build an inductor of any value!
- Inverted Vee Antenna – Calculate the wire length for an inverted vee antenna.
- Parallel Resistor, Inductor or series capacitor calculator – Work out up to ten values, simply.
- Electricity cost calculator – Work out what an appliance costs to run if you know your electricity rate in kWh!