25歳からと35歳から積立：60歳時点で1,000万円の差がついた
複利計算で2人の積立期間の違いを比較し、時間の価値を示す。
5 min1200 words
複利効果により投資が時間とともにどのように増えるかを計算します。貯蓄に対する複利の力を確認しましょう。
finance
複利計算ツール
複利効果により投資が時間とともにどのように増えるかを計算します。貯蓄に対する複利の力を確認しましょう。
入力
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結果
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Compound 金利計算機とは何ですか
A Compound 金利 計算機 shows how your money grows when 金利 is earned not just on your initial 投資, but also on the 金利 that accumulates over 時間. This '金利 on 金利' effect is the foundation of long-期間 wealth building and why starting to invest early makes such a dramatic 差.
使い方
Enter your initial 投資 金額, expected 年次 金利 (historical stock market 平均 is about 10%, conservative estimate is 6-7%), the 番号 of years you plan to invest, and how often 金利 compounds (月次 is most common). The 計算機 shows your future 値, 合計 金利 earned, and 成長 パーセンテージ.
よくある質問
What is compound interest?
Compound interest is the interest on a loan or deposit calculated based on both the initial principal and the accumulated interest from previous periods. Essentially, it means earning 'interest on interest,' which causes your wealth to grow at a faster rate compared to simple interest.
How is compound interest calculated?
The formula used is A = P(1 + r/n)^(nt), where 'A' is the future value, 'P' is the principal investment amount, 'r' is the annual interest rate (decimal), 'n' is the number of times interest is compounded per year, and 't' is the time in years.
What is the difference between simple interest and compound interest?
Simple interest is calculated only on the original principal (the amount of money you initially deposited or borrowed). Compound interest is calculated on the principal plus any interest that has already been added to the account.
Why does the compounding frequency matter?
The frequency determines how often interest is added to the principal. The higher the frequency (e.g., daily vs. annually), the faster your investment grows because interest is calculated on a more regularly increasing balance.
Can I include monthly contributions in this calculation?
Yes, this calculator supports recurring deposits. By entering a monthly contribution amount, you can see how regular savings combined with compound interest accelerate your investment growth over time.
What is the 'Principal' amount?
The principal is the initial sum of money you are investing or saving. It is the starting balance before any interest or additional contributions are applied.
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