⚡ Quick Answer

An investment calculator shows how much your money will grow over time with regular contributions and compound returns. Investing 10,000 rupees monthly for 20 years at 10% annual return grows to approximately 7.6 million rupees — even though you only contributed 2.4 million! The difference is investment growth.

💰 Finance

📊 Investment Calculator

See exactly how your investments grow over time. Add monthly contributions, choose your expected return rate, and discover your future wealth. Start planning today!

✏️ Enter Your Values

💰 Initial Investment

💸 Monthly Contribution

📈 Expected Annual Return (%)

📅 Investment Period (years)

✨ Your Result

🦉Owl's Explanation

📊

Fill in the values above and click Calculate ✨

🤔 How Does This Work?

The Investment Calculator uses the Future Value of Annuity formula with compound interest:

Initial investment grows using: A = P x (1 + r)^t
Monthly contributions use: FV = PMT x ((1+r)^n - 1) / r
r = monthly rate (annual rate / 12 / 100)
n = total months (years x 12)
Both are added together for your total future value

Results show total value, total amount contributed, total growth/returns, and the percentage gain — giving you a complete picture of your investment's performance.

✅ Trusted Tool

The 365tool.net Investment Calculator uses standard financial mathematics used by investment advisors and financial planners worldwide. Results are projections based on a constant rate of return — actual returns vary. Always consult a qualified financial advisor before making investment decisions. Free, private, no sign-up.

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How Compound Investment Growth Works

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❓ FAQ

What is a realistic investment return rate?▼

It depends on the investment type. Sri Lanka fixed deposits: 8-12%. Index funds/stocks globally: 7-10% long-term average. Real estate: 6-12%. High-yield savings: 5-8%. Riskier investments can return more but also lose more. Always consult a financial advisor.

Should I invest a lump sum or monthly contributions?▼

Both are powerful. A lump sum benefits from more time in the market. Monthly contributions (called rupee/dollar cost averaging) reduce the risk of investing at the wrong time. Ideally, do both — invest what you have now AND contribute monthly.

When should I start investing?▼

As soon as possible! Time is the most powerful factor in investment growth. Investing 5,000 rupees/month starting at age 25 instead of 35 can result in 3-4 times more wealth by retirement. Even small amounts invested early beat large amounts invested late.

What is the difference between investing and saving?▼

Saving keeps money safe (low risk, low return — bank savings accounts). Investing puts money to work for potentially higher returns (higher risk, higher potential return — stocks, real estate, funds). A good financial plan includes both: save for emergencies, invest for long-term wealth.

How much should I invest each month?▼

A common guideline is the 50/30/20 rule: 20% of income for savings and investments. If you earn 100,000 rupees/month, invest at least 20,000. However, even 5,000/month invested consistently for 20 years at 10% return grows to over 3.8 million rupees!

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