Wire sizing, circuit breakers, lighting calculators.
Pick the correct circuit breaker for a given continuous load, with NEC 80% rule and IEC adjustments. Supports general, dedicated, and motor circuits.
Open →Check conduit fill for THHN wire in EMT or PVC against the NEC 40% rule and find the most wires of each size a conduit can hold, with the full chart.
Open →Calculate how much your appliance costs per month and per year based on power, usage hours, and electricity tariff.
Open →What size generator you need: add running watts of your appliances plus the largest starting surge, with central AC sizing and CO and backfeed safety.
Open →Calculate lumens and watts needed to light a room based on area, room type, and source efficacy (LED, CFL, halogen, incandescent).
Open →Solve Ohm's law for voltage, current, resistance, or power. Enter any two known values and get the rest, including the power dissipated.
Open →Decode resistor colour bands into resistance and tolerance. Supports 4-band and 5-band resistors with the full IEC 60062 colour table.
Open →Calculate voltage drop across a wire run based on length, current, gauge, and system voltage. Checks against the 3% recommended limit.
Open →Convert watts to amps and amps to watts for DC, single-phase, and three-phase supplies, including power factor and apparent power in VA.
Open →Pick the right wire size (AWG or mm²) for your circuit based on current load and the number of conductors in the raceway. Based on NEC and IEC ampacity tables.
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