single phase Motor capacitor calculator

Estimate single-phase motor run/start capacitor size from supply voltage, current, and frequency. Uses C≈k·I/V with 50/60 Hz factors and quick HP/kW rules.

Negative Sequence Voltage Calculator

Calculate negative sequence voltage from three-phase voltages using symmetrical components. Helps assess unbalance and protect rotating machines.

Short Circuit Current Calculator

Easily calculate short circuit current (Isc) using system voltage and impedance values. Useful for fault analysis and protective device sizing.

DC Machine Core Loss Calculator

Calculate DC machine core loss (iron loss) from hysteresis and eddy currents using flux density, frequency, and material constants.

DC Motor Total Power Loss Calculator

Calculate total power loss in a DC motor, including copper, iron, mechanical, and stray losses for efficiency and performance analysis.

Motor Efficiency Calculator

Quickly compute motor efficiency from input power, output power, voltage, current, and PF. Get losses and helpful formulas for single- or three-phase motors.

Transformer kVA Calculator Based on Load

Easily calculate transformer kVA size from load in kW or HP, voltage, and power factor. Supports single-phase and three-phase calculations.

Capacitor Bank Calculator

Calculate the required capacitor bank kVAR to correct the power factor. Enter load kW, initial PF, and desired PF for accurate capacitor sizing.

Horsepower to Amperes Calculator

Convert horsepower (HP) to motor current (Amps) using voltage, efficiency, and power factor. Supports single-phase and three-phase AC motors.

How to Find 3 Phase Neutral Current

Calculate the neutral (return) current in 3-phase, 4-wire systems from phase currents or phasors — includes formulas, converter table, sample calculations, and FAQs.

Horsepower Calculator

Convert between horsepower, kW, watts, torque, and RPM. Supports mechanical/electrical HP, single- and three-phase, plus quick HP↔kW conversions.

Motor Speed Calculator

Calculate motor speed from frequency and poles, and estimate slip speed for induction motors. Fast, accurate, and easy-to-use motor RPM tool.

Calculate kVA Size for Single & Three Phase Transformers

Easily calculate transformer kVA size for single-phase and three-phase loads using kW, power factor, voltage, and current with formulas and tables.

Full Load Current Turns Ratio calculator for Transformer

Compute transformer full-load current for single/three-phase and find turns ratio a = Np/Ns = Vp/Vs = Is/Ip. Includes examples and quick reference tables.

CT Ratio Calculator

Calculate the CT secondary current from the primary current and the CT ratio, or find the correct CT ratio for your system. Includes formulas, tables, and examples.

VT Ratio Calculator

Calculate the VT secondary voltage from the primary voltage or find the required VT ratio for your system. Includes formulas, tables, and examples for easy conversion.

Busbar Current Calculator

Easily calculate busbar current for single-phase and three-phase systems. Use formulas, tables, and examples to size busbars safely and accurately.

Power Loss Calculator

Calculate electrical power loss using I²R and efficiency formulas. Simple tool with tables, examples, and FAQs for engineers and students.

Armature Voltage Calculator for DC Motor

Easily calculate armature voltage for DC motors using speed, torque, current, and resistance. Includes formulas, examples, and a step-by-step guide.

Armature Current Calculator

Easily calculate armature current for DC motors using voltage, resistance, speed, or torque. Includes formulas, examples, and a step-by-step guide.

Amperes to Horsepower Calculator

Convert electrical current (A) to mechanical horsepower (HP) for single- and three-phase systems using voltage, power factor, and efficiency with clear formulas and worked examples.

Battery Capacity Calculator

Quickly calculate battery capacity (Ah or Wh) and runtime for DC loads; includes conversions, depth-of-discharge, efficiency, series/parallel sizing, and worked examples.

Battery Life Calculator

Calculate battery life in hours. Enter capacity (Ah/Wh), load power, voltage, depth of discharge, and efficiency to find runtime.

Line-to-Line Voltage Calculator

Convert between line-to-line (V_LL) and line-to-neutral (V_LN) voltages, compute phasor line voltages from phase voltages, and check common system voltages (230/400, 277/480, 240/415).

Voltage Imbalance Calculator

Calculate percent voltage imbalance (PVU) using both phase-deviation and negative-sequence methods. Includes formulas, examples, and troubleshooting tips.

Ripple Voltage Calculator

Calculate ripple voltage in rectifier circuits using load current, capacitor, and frequency. Includes formulas, examples, tables, and troubleshooting tips.