Free AI-Powered Electrical Calculators – Size Equipment & Forecast Energy Costs

Calculate the minimum short-circuit current (fault current) at the end of a low-voltage circuit — essential for verifying protective device sensitivity and ensuring safe electrical system design. This tool helps engineers, electricians, and designers determine how much current flows during a short c

Calculate equivalent capacitance for capacitors in series or parallel. Supports µF, nF, pF. Useful for circuit design, filter tuning, and electronics education. When You Need This Calculation Designing a low-pass filter using multiple capacitors Creating a custom capacitance value when exact part

This tool calculates the equivalent resistance of several resistors connected either in series or in parallel. Enter each resistor value with its unit (Ω, kΩ, or MΩ), and the calculator will apply the correct formula automatically. How It Works Resistors in Series When resistors are connected end-to

Calculate the operating current (Ib) of electrical equipment based on active power, voltage, power factor, and coincidence factor—essential for sizing cables, breakers, and protection devices in AC systems. This tool helps engineers, electricians, and designers determine the actual running current u

Calculate DC and AC voltage from current, resistance, power, impedance, or power factor. Supports Ohm’s Law, real/reactive power, and RMS values for engineers, technicians, and students. Known Parameters Formula Circuit Type Notes Current (I), Resistance (R) V = I ×

Calculate voltage drop in DC and AC circuits using IEC 60364-5-52 and NEC standards. Supports wire size, length, material, temperature, and parallel conductors for engineers, electricians, and designers. Parameter Purpose Typical Values Impact on Voltage Drop Current T

Calculate DC resistance of copper or aluminum wires with temperature correction, parallel conductors, and mm²/AWG input. Supports IEC 60228 & NEC Table 8 for accurate voltage drop and power loss estimation. Accurately compute the DC resistance (in ohms) of electrical conductors based on material

Calculate maximum prospective short-circuit current (Isc) at any point in a low-voltage AC circuit per IEC 60909. Supports 3-phase, L-L, L-N, and L-PE faults based on source impedance and conductor data. Who Uses This Tool? Designed for electrical engineers, solar designers, electricians, and facili

Calculate maximum cable length for DC, single-phase, two-phase, and three-phase systems while respecting voltage drop limits and insulation temperature ratings. Supports copper/aluminum, parallel conductors, and IEC 60364 & NEC Article 215 compliance. When You Need This Calculation Determining

Free online cable power loss calculator. Instantly compute I²R losses, voltage drop, and efficiency for DC/AC systems — supports copper, aluminum, and parallel conductors. How much power is lost as heat in your wires? Enter voltage, load, length, and wire size to instantly calculate I²R losses, volt