Electrical & Electronics Calculators
Electrical and electronics calculations are fundamental to circuit design, power system analysis, and electronic component selection. These tools help engineers and technicians compute Ohm's law values, power dissipation, impedance matching, RC time constants, and transformer ratings.
All Electrical & Electronics Calculators
L E D Resistor Calculator
Professional l e d resistor and analysis. See formula, variable legend, worked example and unit conversions. Instant electronics solver.
Voltage Divider Calculator
Professional voltage divider and analysis. See formula, variable legend, worked example and unit conversions. Instant electronics solver.
Current Divider Calculator
Professional current divider and analysis. See formula, variable legend, worked example and unit conversions. Instant electronics solver.
Wheatstone Calculator
Professional wheatstone and analysis. See formula, variable legend, worked example and unit conversions. Instant electronics solver.
Power Factor Calculator
Calculate power factor for electrical circuits. Enter your values — see the result with Ohm's Law or the relevant formula applied. Free.
Transformer Calculator
Calculate transformer quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.
Three Phase Calculator
Professional three phase and analysis. Full formula with variable legend, worked example and step-by-step chemistry solution.
Motor Efficiency Calculator
Calculate motor efficiency quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.
Battery Life Calculator
Calculate battery life electronics quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.
Charge Time Calculator
Calculate battery charge time from capacity and charger output. Enter mAh and watts — see full charge time with 80% fast-charge estimate. Free.
Solar Panel Sizing Calculator
Size a solar panel system for your energy needs. Enter daily kWh usage and location — see required kW capacity and roof space. Free.
Inverter Sizing Calculator
Calculate inverter sizing quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.
Earthing Resistance Calculator
Professional earthing resistance and analysis. See formula, variable legend, worked example and unit conversions. Instant electronics solver.
Cable Voltage Drop2 Calculator
Professional cable voltage drop2 and analysis. See formula, variable legend, worked example and unit conversions. Instant electronics solver.
Circuit Breaker Sizing Calculator
Professional circuit breaker sizing and analysis. See formula, variable legend, worked example and unit conversions. Instant electronics solver.
Kirchhoff Calculator
Calculate kirchhoff quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.
Thevenin Norton Calculator
Calculate thevenin norton quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.
Filter Design Calculator
Calculate filter design quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.
Op Amp Gain Calculator
Calculate op amp gain quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.
Timer N E555 Calculator
Calculate NE555 timer IC timing values. Enter resistors and capacitor — see frequency, duty cycle, and period for astable/monostable modes. Free.
P C B Trace Width Calculator
Calculate pcb trace width quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.
Decibelm W Calculator
Professional decibelm w and analysis. See formula, worked example and wave diagram. Instant physics result. Free online solver.
Antenna Gain Calculator
Calculate antenna gain quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.
Fresnel Zone Calculator
Calculate fresnel zone quickly and accurately. Enter your values — see the result with formula, worked example, and step-by-step explanation. Free.
Link Budget Calculator
Professional link budget and analysis. Instant result with breakdown, formula and payment schedule. Free financial calculator.