Electrical & Electronics Calculators

Professional l e d resistor and analysis. See formula, variable legend, worked example and unit conversions. Instant electronics solver.

Professional voltage divider and analysis. See formula, variable legend, worked example and unit conversions. Instant electronics solver.

Professional current divider and analysis. See formula, variable legend, worked example and unit conversions. Instant electronics solver.

Professional wheatstone and analysis. See formula, variable legend, worked example and unit conversions. Instant electronics solver.

Calculate power factor for electrical circuits. Enter your values — see the result with Ohm's Law or the relevant formula applied. Free.

Calculate transformer quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.

Professional three phase and analysis. Full formula with variable legend, worked example and step-by-step chemistry solution.

Calculate motor efficiency quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.

Calculate battery life electronics quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.

Calculate battery charge time from capacity and charger output. Enter mAh and watts — see full charge time with 80% fast-charge estimate. Free.

Size a solar panel system for your energy needs. Enter daily kWh usage and location — see required kW capacity and roof space. Free.

Calculate inverter sizing quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.

Professional earthing resistance and analysis. See formula, variable legend, worked example and unit conversions. Instant electronics solver.

Professional cable voltage drop2 and analysis. See formula, variable legend, worked example and unit conversions. Instant electronics solver.

Professional circuit breaker sizing and analysis. See formula, variable legend, worked example and unit conversions. Instant electronics solver.

Calculate kirchhoff quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.

Calculate thevenin norton quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.

Calculate filter design quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.

Calculate op amp gain quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.

Calculate NE555 timer IC timing values. Enter resistors and capacitor — see frequency, duty cycle, and period for astable/monostable modes. Free.

Calculate pcb trace width quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.

Professional decibelm w and analysis. See formula, worked example and wave diagram. Instant physics result. Free online solver.

Calculate antenna gain quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.

Calculate fresnel zone quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.

Professional link budget and analysis. Instant result with breakdown, formula and payment schedule. Free financial calculator.