DinSketchChoose the tool for your question
Use current from power or power from current for loads. Check conductor resistance, losses and voltage drop for a cable run. Lighting tools cover luminaire count and LED strip power.
Check inputs before results
Confirm the supply type, voltage, cable length, conductor material and power factor where required. Keep units consistent: watts and kilowatts, meters and square millimeters describe different quantities. Appropriate assumptions matter more than extra decimal places.
Learn through reference circuits
Interactive diagrams explain switches, relays and protection. The workshop connects input changes with circuit behavior. Calculations supplement rather than replace equipment documentation and engineering review.
Questions and answers
Can I open the tools without an editor project?
Yes. Calculators and references are available as a separate section.
Are there three-phase calculations?
Relevant tools include a three-phase model. Check its assumptions and whether voltage is line-to-line.