Physics

Calculate LED strip amps, total watts, supply size, and amps per equal power feed for a low-voltage LED strip.

Estimate LED strip length, rolls, leftover strip, watts, amps, power supply size, and feed sections for a room or straight run.

Estimate LED lumens, candela, lux, and beam spot width from mcd, lumens, or a lux meter reading.

Find an LED resistor or LED current from voltage, LED count, and resistor value, with wattage and tolerance range checks.

Size a constant-current LED driver or LED resistor using voltage, current, series rows, parallel rows, and power reserve.

Calculate the minimum wattage and DC output current for a voltage-matched constant-voltage LED strip power supply.

Find LED watts from lumens and efficiency, including per-fixture watts, range mode, yearly cost, and optional savings.

Estimate LED lumens, watts, or room light count using lumens per watt, bulb lumens, and a usable light factor.

Calculate motor horsepower from volts, amps, efficiency, power factor, and DC, single-phase AC, or three-phase AC supply.

Calculate single-phase AC real power, current, voltage, or power factor from RMS electrical values.