Investment Calculator
Calculate the future value of your investment using compound interest. Plan your wealth growth with annual projections, return breakdowns, and interactive charts.
About This Calculator
The Investment Calculator helps you project the future value of a lump sum investment using the power of compound interest. Whether you are planning for retirement, a down payment on a home, or building long-term wealth, this tool gives you a clear picture of how your money can grow over time. Simply enter your principal amount, expected annual return rate, and investment tenure in years to see detailed projections.
The calculator uses the standard compound interest formula: Future Value = Principal x (1 + Rate of Return)Tenure. This formula assumes annual compounding, which is the most common basis for long-term investment projections. The yearly breakdown table shows the value at the end of each year so you can track the compounding effect over time.
Regional Notes
India (IN): Common investment options include equity mutual funds (10-15% historical returns), fixed deposits (5-8%), PPF (7.1% for FY25-26), and NPS (8-10%). Consider the impact of capital gains tax and indexation benefits on long-term investments held over 3 years.
United States (US): Popular investment vehicles include S&P 500 index funds (8-10% historical average), 401(k) retirement accounts, and IRAs. Long-term capital gains are taxed at 0%, 15%, or 20% depending on income level. Consider dollar-cost averaging through regular contributions.
United Kingdom (UK): ISAs (Individual Savings Accounts) offer tax-free investment growth up to £20,000 per year. The FTSE 100 has historically returned 6-8% annually. Capital gains tax applies above the annual exempt amount (£3,000 for 2025-26).
Frequently Asked Questions
How does the Investment Calculator work?
The Investment Calculator uses the compound interest formula FV = P x (1 + r)^t to project the future value of a lump sum investment. Enter your principal amount, expected annual return rate, and investment tenure in years to see your total value, total returns, and a yearly growth breakdown.
What is compound interest and why does it matter?
Compound interest is interest earned on both your principal and previously accumulated interest. It matters because it accelerates wealth growth over time -- the longer your investment horizon, the more powerful compounding becomes. For example, ₹1,00,000 invested at 12% for 10 years grows to approximately ₹3,10,585.
What is a good annual return rate for investments?
A good annual return rate depends on the asset class and market. In India, equity mutual funds have historically returned 10-15% annually, fixed deposits offer 5-8%, and PPF provides about 7.1%. In the US, the S&P 500 has averaged 8-10% annually. In the UK, the FTSE 100 has returned 6-8% on average.
Is the Investment Calculator free to use?
Yes, the Investment Calculator is completely free to use with no registration or account required. You can calculate unlimited scenarios and share your results with others via the URL.
How do I interpret the yearly breakdown table?
The yearly breakdown table shows your investment value and cumulative returns at the end of each year. Each row represents one year of compounding. You can see how your money grows progressively faster over time due to the compounding effect on both principal and previously earned returns.
What is the difference between simple interest and compound interest?
Simple interest is calculated only on the principal amount, so returns grow linearly each year. Compound interest is calculated on both the principal and accumulated interest, so returns grow exponentially. Over long periods, compound interest produces significantly higher returns than simple interest.
Can I use this calculator for different currencies?
Yes, the Investment Calculator automatically detects your region and displays results in the appropriate currency (₹ for India, $ for US, £ for UK). You can enter amounts in any currency -- the calculator treats the input as a numeric value and applies the formula universally.
How often should I review my investment plan?
Financial experts recommend reviewing your investment plan at least once a year or after major life events such as a job change, marriage, or retirement. Regular reviews help ensure your portfolio stays aligned with your goals and risk tolerance. Use the calculator to model different scenarios and expected returns.