The Three-Phase Power Calculator is an interactive web-based tool designed for electrical engineering applications, enabling users to compute active (P), reactive (Q), and apparent (S) power, as well as power factor correction capacitance, in real time for three-phase systems. By entering line voltage, line current, and power factor, users can instantly see calculated results and visualize system behavior, making it suitable for analyzing and understanding the dynamics of three-phase electrical circuits.
Key features include the ability to select between Y (Star) and Δ (Delta) connection types, which adjusts the relationships between line and phase voltages and currents according to established electrical formulas. The tool provides immediate feedback through a real-time animation that displays rotating phasors, waveforms, and instantaneous power, as well as graphical representations such as a phasor diagram and a power triangle chart. These visualizations help clarify the effects of different power factors and connection types on system performance, including the impact on active and reactive power, and demonstrate the advantage of three-phase systems in delivering constant instantaneous power for balanced loads.
The calculator also determines the required capacitance for power factor correction, a practical concern in industrial and utility settings where low power factor can lead to inefficiencies and extra charges. Example use cases highlighted include sizing electrical service for industrial motors, calculating requirements for capacitor banks in power factor correction, and determining apparent power ratings for data center UPS systems and renewable energy inverters.
The tool is delivered via a web interface and does not require installation. It is designed for professionals and students in electrical engineering who need to perform accurate three-phase power calculations and visualize system characteristics. No information is provided regarding pricing, licensing, or the developer beyond the association with NovaSolver.
Three-Phase Power Calculator is a Developer Tools product. It focuses on calculating three-phase power and related parameters quickly and accurately for electrical engineering tasks. It is built as a B2B product for electrical engineers. Three-Phase Power Calculator costs nothing to use. The product ships for the web.
NovaSolver builds and maintains Three-Phase Power Calculator, and the product first shipped in 2026. Development happens publicly on GitHub with 7 commits in the last 90 days. Key capabilities include real-time calculation, phasor diagram, and power triangle chart. The interface is available in English, Japanese, and Chinese.
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