About ElectricalConverters

Free, accurate electrical calculators — and the people and standards behind them.

ElectricalConverters is a free collection of electrical unit calculators — watts to amps, kVA to kW, kWh to watts, battery capacity, and more. Every tool runs entirely in your browser, requires no signup, and stores none of your data. Our goal is simple: give engineers, electricians, students, and DIYers a fast, trustworthy answer with the formula shown so you can check the math yourself.

Who builds this

ElectricalConverters is built and maintained by an electrical engineering student together with our editorial team. We are enthusiasts and students of electrical engineering — we are not a licensed electrical contractor, and nothing on this site is a substitute for professional design or inspection. Where a calculation touches safety (breaker or conductor sizing), we cite the relevant code so you can verify it against an authoritative source.

How our calculators are checked

Each calculator is built and reviewed against standard electrical engineering references:

  • Core conversions use the fundamental relationships between power, current, voltage, resistance, energy, and charge (Ohm's Law, P = V × I, and the three-phase factor √3).
  • Breaker- and wire-sizing guidance references the National Electrical Code (NEC / NFPA 70) — for example, the 125% continuous-load rule in NEC 210.20(A).
  • Worked examples are recomputed independently and cross-checked against the live calculator output.
  • Pages carry a "Last updated" date; we revise them when standards, examples, or explanations change.

Editorial standards

We show the formula and a worked example on every page rather than just a black-box result. We do not publish fabricated ratings or reviews, and we clearly separate reference estimates from code-compliant design decisions. If you spot an error, please contact us — corrections are welcome and taken seriously.

Reviewed by

Content on ElectricalConverters is written and reviewed by the ElectricalConverters editorial team, including an electrical engineering student. Last reviewed: July 2026.