Reactive Power Converter

Reactive Power Converter — Convert VAR, kVAR, MVAR Online

The Reactive Power Converter is a free online tool that converts between every common reactive power unit: VAR (volt-amperes reactive), kVAR, MVAR, GVAR, and other electrical units. Reactive power is essential in AC circuit analysis — it represents the power that oscillates between source and load without doing useful work, but is required to maintain magnetic fields in motors, transformers, and inductive equipment. Electrical engineers, power system designers, facility managers, and electrical contractors rely on accurate reactive power calculations every day.

Understanding Reactive Power

In AC systems, total apparent power (measured in VA) is the vector sum of real power (measured in watts, doing actual work) and reactive power (measured in VAR, sustaining magnetic and electric fields). Industrial loads with motors and transformers consume significant reactive power, which utilities often charge for via power factor penalties. Accurate conversion between VAR units is critical when sizing capacitor banks for power factor correction, designing UPS systems, or analyzing data center power quality.

How to Use the Converter

Enter your reactive power value, select the source unit (VAR, kVAR, or MVAR), and choose the target unit. The conversion appears instantly with full precision. The tool handles scientific notation for very large utility-scale values and decimal precision for small residential measurements.

Common Use Cases

Power engineers size capacitor banks for utility substations. Facility managers analyze power quality reports. Electrical contractors verify equipment ratings. Students complete electrical engineering homework on AC power systems. The tool is free, runs entirely in your browser, mobile-friendly, and requires no signup. Bookmark it for fast reactive power conversion anytime.

Tamer Baghdadi

CEO / Co-Founder