About WebDentaku

WebDentaku is a free collection of online calculators designed for everyday life, study, and business. Built with speed, accuracy, and zero friction in mind — no registration, no ads overload, just fast results.

Available Tools

• 電卓 — 基本的な四則演算・メモリ機能付きの無料電卓
• 関数電卓 — 三角関数・対数・指数など高度な数学計算
• 分数電卓 — 分数の足し算・引き算・掛け算・割り算・約分
• 消費税計算 — 税込・税抜価格と消費税額を瞬時に計算
• パーセント計算 — 割合・百分率・変化率の計算
• BMI計算 — 身長・体重からBMIと適正体重を計算
• ローン計算 — 住宅・車ローンの返済額シミュレーション
• 割引計算 — セール・割引後の支払い金額を計算
• 年齢計算 — 生年月日から年齢・和暦・干支・星座を計算
• 時間計算 — 時間の足し算・引き算・勤務時間計算
• 単位変換 — 長さ・重さ・温度・面積などの単位換算

Key Features

• Completely Free: All tools are free to use with no hidden charges.
• No Registration: No account or login required.
• Instant Results: Calculations run in your browser in real time.
• Mobile Friendly: Works great on smartphones and tablets.
• High Precision: Custom engine minimises floating-point errors.
• Keyboard Support: Use your keyboard for faster input on desktop.
• PWA Ready: Add to your home screen for offline-like access.

Disclaimer

Results provided by this site are for reference only. For decisions involving tax, law, medicine, or finance, always consult a qualified professional. WebDentaku accepts no liability for actions taken based on calculation results.

Browser Support

Tested on the latest versions of:

• Google Chrome (recommended)
• Mozilla Firefox
• Apple Safari
• Microsoft Edge

Contact

For feedback, bug reports, or tool requests, visit the Contact page.

Privacy & Cookies

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