Who We Are — 私たちについて
Watt Calculator is an independent digital engineering initiative and educational resource developed by an international team of licensed professional engineers (PE), electrical engineering researchers, software architects, and STEM educators. We are united by a common conviction: mathematical rigor in electrical science should be accessible, instant, and completely transparent to everyone.
Our team brings together over 40 years of combined hands-on experience spanning industrial power distribution, commercial electrical contracting under National Electrical Code (NEC) standards, renewable solar-plus-storage engineering, and low-power embedded circuit design. We build tools that bridge the gap between abstract textbook formulas and real-world job-site application.
What We Do — 私たちの取り組み
At Watt Calculator, we research, engineer, calibrate, and freely publish high-precision computational tools for electrical power calculations, unit conversions, and circuit analysis. Our platform serves licensed electricians, power systems designers, electrical contractors, university researchers, and vocational students across 19 specialized calculators:
Deterministic 12-formula matrix solving Watts (P), Volts (V), Amps (I), and Ohms (R) with real-time algebraic step-by-step proofs.
3-Phase AC power solvers for Wye and Delta configurations, apparent power (kVA), reactive power (kVAR), and power factor correction.
Photovoltaic solar array sizing, battery capacity & runtime calculators (Watt-hours & Amp-hours), and Level 1/2/3 EV charging power solvers.
NEC 2026 wire gauge (AWG) ampacity tables, continuous load 125% derating rules, voltage drop estimations, and appliance power profiling.
All calculations are performed entirely client-side directly within your device's browser using 64-bit floating-point math. No inputs or electrical parameters are ever transmitted to remote servers, guaranteeing total data confidentiality, zero network latency, and instant results even when disconnected from the internet.
Our Story — 私たちの歩み
Watt Calculator was founded out of a shared frustration with the state of online technical tools. In late 2023, while teaching electrical engineering coursework and conducting field audits for industrial facilities, our founders noticed a recurring problem: existing online electrical calculators were either bloated with intrusive pop-up advertisements, hid their mathematical logic behind mysterious "black-box" buttons, suffered from floating-point rounding errors, or required invasive user registrations and constant internet connectivity.
In early 2024, we set out to build a modern alternative rooted in an uncompromising principle we call the Open Formula Mandate: every calculation must display its intermediate algebraic derivation in real time, normalize to base SI units, and execute 100% locally in the browser with zero tracking.
What started as a single, clean Watt-Volt-Amp-Ohm solver quickly resonated with apprentices, journeyman electricians, university professors, and robotics hobbyists worldwide. In 2025, we expanded the platform into a comprehensive suite of 19 specialized calculators—ranging from 3-Phase industrial AC and EV charger ratings to solar photovoltaic sizing and NEC 2026 wire ampacity tables—and completely localized the entire experience into 18 native languages.
Today, Watt Calculator serves hundreds of thousands of engineers, tradespeople, and students each month. We continue to operate as an independent, ad-respectful engineering utility committed to accuracy, privacy, and open STEM education.
数学的透明性：オープンフォーミュラ宣言
結果の数値だけでなく、適用された計算式をリアルタイムで可視化します：
- 数式の透明化：2つの数値を入力すると使用された計算式が直ちに表示されます。
- 国際単位系（SI）の一貫性：内部で基準単位に正規化され、桁数の誤りを防ぎます。
- 厳密な閉形式計算：12種類の関係式を数値誤差なく確定的に解きます。
電気工学標準規格への準拠
国際的な電気工学基準（IEEE、IEC、JIS準拠）に基づいて設計されています：
有効電力、無効電力、インピーダンスの標準定義に準拠。
許容電流および基準電圧の工学的慣例に準拠。
商用電源電圧（100V/200V、230V/400V）に対応。
SI接頭辞（マイクロ、ミリ、キロ、メガ等）を厳格に適用。
ローカルファーストのプライバシー設計
計算データやエンジニアリング情報は利用者の私有財産です。入力をバックエンドの解析エンジンや外部AIに送信する他のサイトとは異なり:
- 100% クライアント側計算: すべての算術・三角関数・変換処理は、ブラウザ内のJavaScriptエンジン内でのみ実行されます。
- アカウント登録不要: 会員登録や有料プラン、メルマガ登録などの制限なしに今すぐ利用可能です。
- データ送信ゼロ: 入力された電圧、電流、電力、回路パラメータをサーバーに送信・記録することは一切ありません。
技術諮問と専門家レビュー
実務に携わる電気技術者や教育者により継続的に検証されています。
64ビット浮動小数点による自動回帰テストをミリボルトからメガボルトまで実施しています。
Marcus Vance, PE
電力システム主任レビューア
配電盤設計、産業用モーター制御、高圧送電網保護の分野で20年以上の実務経験。
Dr. Elena Rostova
組み込みエレクトロニクス専門家
微細電子工学博士。低消費電力IoT回路、バッテリー化学動態、熱放散設計の第一人者。
Siddharth Nair
チーフ・ソフトウェア・アーキテクト
ブラウザ内数値計算、ウェブアクセシビリティ規格、多言語国際化アーキテクチャの専門家。
Parent Company & Legal Entity — 親会社および法人組織
Watt Calculator (accessible at wattcalculator.org) is an official digital computational service and educational publishing property owned, operated, and maintained by its parent company and legal business entity, Watt Calculator Inc.
Corporate & Business Entity Overview
San Francisco, CA 94105, United States
Legal: legal@wattcalculator.org
Corporate Relationship & Operational Governance: As the governing business entity, Watt Calculator Inc. assumes full legal and administrative responsibility for the infrastructure, scientific algorithms, domain assets, intellectual property, and privacy standards implemented across all 18 localized editions of the website.
Editorial Independence Policy: Watt Calculator Inc. enforces strict editorial and engineering autonomy. None of our calculation algorithms, equipment ratings, or educational articles are sponsored by electrical equipment manufacturers, utility corporations, or commercial contractors. All recommendations strictly reflect published engineering standards (IEEE, NFPA/NEC, IEC, and BIPM).