どんな計算に使えますか？

割引価格、得点率、前年比、構成比など日常・ビジネスのパーセント計算全般に使えます。

消費税計算もできますか？

値上げ率モードで税率を入れれば税込価格が算出できます。

無料で使えますか？

完全無料で、すべてブラウザ上で計算されます。

パーセント計算

日常・ビジネスで頻繁に使う5種類のパーセント計算をまとめて実行できるツールです。計算式も同時表示されます。

Calculation mode

Calculate a percentage of a total. e.g. 20% of 500.

A (%)

B (total)

Result

100

20% × 500 = 100

Practical Guide

Calculators for age, dates, loans, BMI, percentages, world time, and everyday business/life math. Useful for quick estimates and checking formulas.

When this tool is useful

パーセント計算 helps with common Life & Calculator tasks that require quick checking, conversion, or creation. It supports workflows such as 5種類のパーセント計算パターンに対応, 割引率・値上げ率・前年比の計算 without forcing users to switch pages or apps.

Processing and privacy

Your input is processed in the browser and is not designed to be sent to a server just to use the tool. This makes it suitable for temporary checks, draft work, and pre-publication cleanup.

Workflow tip

After checking the result, use the related tools and same-category links near the bottom of the page to continue the surrounding task. Frequently used tools also appear in the Recently Used section.