Electrical Calculators

An Electrical Power Calculator calculates electrical power from voltage, current, resistance, power factor, efficiency, and phase information. Electricians, engineers, PLC technicians, panel builders, maintenance professionals, automation specialists, and students can use it for DC, single-phase AC, and balanced three-phase AC calculations. Correct power calculations are important when reviewing equipment loads, …

A Coulomb Calculator applies Coulomb’s law to calculate the electrostatic force between two point charges. Engineers, electronics professionals, technicians, researchers, and students can also use it to determine an unknown charge or the separation distance when the remaining values are known. Electrostatic force calculations are important when studying charged particles, …

A Motor Slip Calculator determines the difference between the synchronous speed of an induction motor’s rotating magnetic field and its actual rotor speed. It calculates synchronous speed, slip speed in RPM, slip as a decimal, slip percentage, and rotor electrical frequency from supply frequency, pole count, and measured rotor speed. …

A Battery Charging Time Calculator estimates how long it will take a rechargeable battery to reach a target state of charge. Electricians, electronics engineers, solar technicians, UPS installers, maintenance professionals, automation engineers, and students can use it to calculate charging time from battery capacity, starting charge level, target charge level, …

A Reactance Calculator determines the opposition that an inductor or capacitor presents to alternating current at a specified frequency. Electricians, electronics engineers, maintenance technicians, automation professionals, panel designers, and students can use it to calculate inductive reactance, capacitive reactance, net RLC reactance, and related phase behavior. Reactance affects AC, voltage …

An Impedance Calculator determines how strongly a circuit opposes alternating current by combining resistance and reactance at a specified frequency. Electricians, electronics engineers, maintenance technicians, automation professionals, panel designers, and students can use it to calculate complex impedance, impedance magnitude, and phase angle for resistor, inductor, capacitor, and RLC circuits. …

A Frequency Calculator determines frequency, period, wavelength, angular frequency, motor supply frequency, pulse rate, or RC cutoff frequency from known engineering values. Electricians, electronics technicians, automation engineers, maintenance teams, PLC programmers, and students can use it to complete common frequency-related calculations without repeatedly rearranging formulas. Frequency is important wherever a …

A Current Calculator helps electricians, engineers, maintenance technicians, PLC programmers, students, and panel builders calculate electrical current in amperes. Depending on the selected method, current can be calculated from voltage and resistance, electrical power, apparent power, power factor, efficiency, or the amount of electric charge transferred over time. Knowing the …

A Transformer Calculator helps electricians, electrical engineers, panel builders, maintenance technicians, automation professionals, and students calculate important transformer values without repeating lengthy manual calculations. Depending on the selected function, it can determine transformer kVA, primary current, secondary current, voltage ratio, turns ratio, efficiency, regulation, or approximate terminal fault current. Transformer …

A Load Calculator estimates connected electrical load, demand load, current, real power, and apparent power from the values entered by the user. It is useful for electricians, electrical engineers, automation technicians, panel builders, maintenance teams, and students working with DC, single-phase, or three-phase electrical systems. Electrical load calculations help users …