ROIの計算方法

投資利益率（ROI）を計算します。ROI = (最終価値 - 初期投資) / 初期投資 × 100%。手順：初期投資と最終価値（または純利益）を入力し、ROIの割合を計算して解釈します。

ROIの計算方法

概要：ROIは初期投資に対する利益または損失の割合を示します。使い方：初期コストと最終価値または純利益を入力して「計算」をクリックします。用途：財務分析、マーケティング効果測定、投資比較など。

例：初期 1000$, 最終 1250$ → ROI = ((1250 - 1000) / 1000) × 100 = 25%

例：初期 1000$, 最終 1250$ → ROI = ((1250 - 1000) / 1000) × 100 = 25%

Frequently asked questions

How is ROI calculated?

ROI = (Final Value − Initial Investment) / Initial Investment × 100%. A positive result means a gain; negative means a loss.

Should fees and taxes be included?

For a realistic ROI, include fees, taxes, and other costs in the initial investment or final value. This tool does not estimate taxes for you.

Is ROI the same as annualized return?

No. Simple ROI ignores time. Annualized returns adjust for holding period and are better for comparing investments of different lengths.

Important notice

ROI results are educational illustrations only and are not investment, tax, or financial advice. Past or hypothetical returns do not guarantee future results.

References: Standard finance definition of return on investment: net gain divided by cost of investment.

ROIの計算方法