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パーセント計算機
Free percentage calculator that handles every common percentage problem: what is X% of Y, percentage increase/decrease, what percentage is X of Y, and reverse percentage.
Specific percentage calculators:
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How it works
This パーセント計算機 runs entirely in your browser — no data is sent to any server. Simply fill in the fields above and the result updates instantly. You can copy the output with the copy button provided.
Frequently Asked Questions
パーセントの計算方法は？
パーセント = (部分 ÷ 全体) × 100%
増減率の計算方法は？
増減率 = (新しい値 - 古い値) ÷ 古い値 × 100%