Is the investment calculator free to use?

Yes. It’s free and runs in your browser - no signup required.

Is the projected return guaranteed?

No. The return is an assumption for planning. Real investments can go up or down and may not match the projected rate.

Does the calculator include fees and taxes?

No. Fees, taxes, and contributions limits vary by account type and location. Treat results as a rough projection.

Does the tool store my numbers?

No. Calculations run in your browser and aren’t stored on our servers.

Should I use this for retirement planning?

Use this for simple compound-growth scenarios. For inflation-adjusted retirement income needs, use the retirement calculator.

Investment Calculator

Calculate compound interest and investment growth over time

Privacy-First • No Data Collection

Investment Calculator

Calculate investment growth with compound interest. Plan for retirement, analyze returns, and determine how much you need to save to reach your financial goals.

計算の種類

計算したいものを選択してください

Investment Parameters

投資の詳細を入力して成長を計算します

初期投資 ($)

毎月の拠出金 ($)

期待年間収益率 (%) *

時間軸 (年) *

配合頻度

インフレ率 (%) - オプション

投資のヒントと戦略

投資を成功させるための重要な原則

Start Early

Time is your greatest asset - compound interest works best over long periods

Dollar-Cost Averaging

Regular contributions help reduce the impact of market volatility

Diversification

Spread risk across different asset classes and sectors

Stay Consistent

Regular contributions, even small ones, add up significantly over time