Electronics Tools

Solve balanced three-phase systems for real power (kW), apparent power (kVA), reactive power (kVAR), line current or line voltage. Includes a power triangle, a Wye vs Delta table, and suggested wire gauge and breaker size.

Calculate frequency, period, and duty cycle for 555 timer circuits in astable and monostable modes. Enter R1, R2, and C values to get instant results with waveform visualization and step-by-step formulas.

Convert amps to watts for DC, AC single-phase and AC three-phase circuits. Enter current, voltage and power factor to get real power in watts plus apparent power (VA) and reactive power (VAR) on an animated power triangle.

Enter a frequency and a velocity factor to get length in metres and feet for dipoles, verticals, ground planes, and loops.

Work out how long a battery lasts from its capacity (mAh, Ah or Wh) and the device's draw (mA, A or W). Includes an animated battery visual, efficiency adjustment and runtime breakdowns for phones, laptops and IoT devices.

Calculate stored charge (Q=CV), energy (E=½CV²), and reactance (Xc=1/2πfC) for capacitors. Decode 3-digit ceramic capacitor codes instantly. Interactive animated diagram with step-by-step solutions.

Enter wire sizes, insulation, and EMT, PVC, RMC, or IMC. Get fill percent and the smallest legal trade size.

Calculate power and voltage gain or loss in decibels, convert between dB and linear scale, and analyze signal levels with dBm and dBW conversions.

Pick appliances, or enter running and starting watts, to size a generator from total running watts plus the single largest surge.

Calculate the total impedance of RLC series and parallel circuits at any frequency. Get magnitude, phase angle, phasor diagram, resonant frequency, Q factor, and step-by-step breakdown.

Enter two of reactance, frequency, and inductance to solve XL = 2*pi*f*L. Add voltage to see RMS current and the 90-degree lag.

Convert between kVA, kW, amps and volts for DC, single-phase and three-phase systems. Enter any two values to get apparent, real and reactive power, current and voltage on a to-scale power triangle, with generator and UPS sizing tips.

Calculate the correct current-limiting resistor for LED circuits. Supports single and series LEDs, finds nearest E24 standard resistor values, shows power dissipation, and includes an interactive animated circuit diagram.

Build and simulate digital logic circuits online with AND, OR, NOT, NAND, NOR, XOR and XNOR gates. Get instant truth tables, animated circuit diagrams, canonical Boolean forms and step-by-step evaluation.

Enter bulb brightness in lumens or incandescent wattage to see power draw across LED, CFL, halogen, and incandescent bulbs plus estimated energy savings.

Enter a target lux and the room area or its dimensions. Get the lumens required, a figure that allows for light loss, and how many bulbs that is.

Convert battery capacity between mAh and Wh using voltage, and check whether your power bank is allowed on a plane. Enter mAh and volts for watt-hours, the FAA and IATA 100 Wh and 160 Wh verdict, and usable mAh at 5 V USB.

Enter any two of voltage, current, resistance, and power. The other two are calculated, with the formula and the steps.

Enter 2 to 10 resistor values to get the equivalent resistance, how current splits, and how power is shared.

Enter current, allowable temperature rise, copper weight, and layer type to calculate required PCB trace width, resistance, and voltage drop under IPC-2221.

Enter voltage, real power, and reactive or apparent power to calculate power factor, power triangle values, and required capacitor correction.

Calculate RC charging and discharging curves, time constants, and voltage at any given time for resistor-capacitor circuits. Get step-by-step formulas and a complete time constant table.

Calculate resistance values from color bands with an interactive visual resistor diagram. Supports 4-band, 5-band, and 6-band resistors with real-time updates, tolerance ranges, and detailed explanations.

Enter any number of series resistances and an optional supply voltage. Get total resistance, shared current, each voltage drop, and power.

Enter values for a series or parallel LC or RLC circuit. Solve for frequency, inductance, or capacitance, and get bandwidth and Q.

Enter room dimensions, ceiling height, and room type to calculate required lumens, recommended bulb counts, and a scaled fixture layout.

Enter up to 12 capacitances in pF, nF, uF, mF, or F. Get the series or parallel total, charge or voltage split, and stored energy.

Calculate turns ratio, secondary voltage, primary and secondary current, and power for electrical transformers. Get step-by-step MathJax formulas for ideal and real transformer analysis.

Calculate unloaded output voltage or find the resistor needed for a target Vout. Review divider current and power dissipation for each resistor.

Calculate voltage drop in electrical wires from the conductor material, AWG size, run length and load current. Essential for safe installations, NEC compliance and preventing power loss in residential, commercial and industrial wiring.

Convert watts to amps for DC, AC single-phase and AC three-phase circuits. Enter power, voltage and power factor for the exact current, the formula used, a current-flow diagram and a suggested copper wire gauge and breaker size.

Calculate wire diameter, cross-sectional area, resistance per length, ampacity ratings, and voltage drop for American Wire Gauge (AWG) sizes from 4/0 to 40 AWG. Supports copper and aluminum conductors with NEC ampacity tables.