Three-Phase Power Calculator for Electrician Study

Use our three-phase power calculator to practise the relationships between line voltage, line current, real power, apparent power, reactive power, and power factor. The calculator is designed as a learning tool and shows the formula, substituted values, and worked steps instead of only returning a final number.

For the common balanced three-phase form, use line-to-line voltage. Power factor belongs in the real-power equation, not the apparent-power equation.

• Real power: P = √3 × VLL × I × PF.
• Apparent power: S = √3 × VLL × I.
• Solve for real power, line current, line voltage, kVA, or reactive power.
• Common mistakes include forgetting √3, mixing phase and line voltage, and misapplying power factor.