Use this engineering calculation for a transparent preliminary estimate or independent arithmetic check when geometry, materials, loads, operating conditions, and units are defined consistently.

Line Voltage Volts (V)

Required number input.

Line Current Amperes (A)

Required number input.

Power Factor

Required number input.

Balanced three-phase active power √3 VLL I cosφ at line-to-line RMS voltage. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Active Watts (W)

The resulting active watts returned as a number.

• Electrical estimates require the correct AC or DC model, RMS and phase conventions, source impedance, grounding, conductor conditions, protection, temperature, harmonics, faults, and applicable standards. Nominal ratings are not automatically compatible design limits.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check assumptions against drawings, measurements, current material data, and the applicable design code. Apply required load combinations and safety factors, then obtain qualified review and testing for consequential designs.

• Three Phase Apparent Power

  Balanced three-phase apparent power √3 VLL I at line-to-line RMS voltage.

• Short Circuit MVA

  Balanced three-phase fault apparent power in MVA from line-to-line voltage in kV and fault current in kA.

• Power Factor Correction Capacitor

  Ideal single-phase shunt capacitance needed to raise lagging power factor at fixed real power, RMS voltage and frequency.