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Free Watts / Volts / Amps
Calculator

Free advanced Watts Volts Amps Calculator for DC, single-phase AC and balanced three-phase AC, with power factor, apparent/reactive power, motor efficiency, power-factor impact, unit conversion, capacity headroom, and CSV export.

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About Free Watts / Volts / Amps Calculator

Handle DC, single-phase AC and balanced three-phase AC without pretending power factor does not exist. Solve for real power, voltage or current, inspect kVA/kVAR and phase angle, compare power-factor scenarios, estimate motor input current from efficiency, and check mathematical current headroom.

Workspace options

  • System
  • Power factor
  • Reactive direction
  • Solve for
  • Current limit · optional
  • Current-limit unit

Available actions

  • W / V / A solver
  • PF impact
  • Motor / load
  • Copy electrical report
  • Export CSV
  • Reset