เครื่องคำนวณการลงทุน

Project your investment growth, analyze ROI, and see how inflation and taxes affect your returns. Get instant results with growth charts and year-by-year breakdown.

รายละเอียดของคุณ

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ค่าเฉลี่ยในอดีตของ S&P 500: ~10%

การปรับเปลี่ยน (ไม่จำเป็น)

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Enter your initial investment, monthly contribution, expected return, and period. Optionally add inflation and tax rate, then click Calculate to see projected growth, ROI, and scenarios.

คู่มือผู้ใช้ฉบับสมบูรณ์

What is ROI and CAGR?

ROI (Return on Investment) measures total return as a percentage of what you put in. CAGR (Compound Annual Growth Rate) is the smoothed annual return that accounts for compounding over time. This calculator projects growth with monthly contributions, then applies inflation and tax adjustments so you see both nominal and real outcomes.

What Your Results Mean

ยอดคงเหลือสุดท้าย

Projected value at the end of the period before taxes; includes contributions and investment gains.

ค่าที่ปรับอัตราเงินเฟ้อ

Today's purchasing power of your future balance. Inflation reduces real value over time.

มูลค่าหลังหักภาษี

Estimated value after capital gains tax on investment gains. Use your expected tax rate.

วิธีใช้เครื่องคิดเลขนี้

  1. Enter initial investment and/or monthly contribution
  2. Set expected annual return and investment period in years
  3. Optionally add inflation rate and capital gains tax rate
  4. Click Calculate to see summary, growth chart, breakdown, and scenarios

หมายเหตุสำคัญ

  • This calculator is for education and estimation only. Not financial or investment advice.
  • Actual returns vary. Past performance does not guarantee future results.
  • Consider consulting a financial advisor for your situation.

เคล็ดลับการลงทุน

  • Diversify across asset classes; don't put all eggs in one basket.
  • Use tax-advantaged accounts (401k, IRA) when possible.
  • Keep fees low; they compound against you over time.
  • Stay invested long-term; time in the market beats timing the market.

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