Investment Calculator: Project Your Portfolio Growth
Investing is one of the most reliable ways to preserve and grow your wealth. However, understanding how much money you'll have in 5, 10, or 20 years is difficult without calculations. The Investment Calculator on Tuble.net helps you plan your savings and visualize the power of compound interest.
What is Compound Interest and Why Does It Matter?
Compound interest means earning returns not just on your initial investment, but also on accumulated gains. This creates a "snowball effect": the longer you invest, the faster your wealth grows. Albert Einstein allegedly called compound interest "the eighth wonder of the world."
Simple example: at 7% annual return, €10,000 grows to €19,672 in 10 years and €38,697 in 20 years. Time is the investor's greatest ally.
How to Use the Calculator?
Enter:
- Initial amount — the capital you're investing today
- Regular contributions — how much you plan to add monthly or annually
- Expected return — average annual rate. For conservative investments (bonds) expect 3-5%, for diversified stock portfolios historically 7-10%
- Investment period — how long you're planning to invest
The calculator shows the final accumulated amount and separately the investment gains.
Principles of Sensible Investing
- Start as early as possible — time works for you through compound interest
- Invest regularly — even small amounts monthly produce impressive results
- Diversify — don't put all eggs in one basket
- Think long-term — short-term market fluctuations shouldn't affect your strategy
- Reinvest dividends — let them compound rather than withdrawing
- Consider tax-advantaged accounts — ISAs, pension schemes, and similar vehicles offer tax benefits
Try the Investment Calculator and plan your financial future.
Related Tools
The Currency Converter is useful for multi-currency investments. The Salary Calculator shows how much you can save from your net income.
Frequently Asked Questions
How does the investment calculator work for projecting returns?
The Investment Calculator calculates future portfolio value based on initial investment, regular contributions, expected returns, and time horizon using compound interest.
What is compound interest and why does it matter for investing?
Compound interest is earning returns on previous returns. Money grows exponentially over time, making early investing significantly more valuable than starting later.
What rate of return should I use for investment calculations?
For conservative estimates, use 6-8% annually. This approximates historical stock market returns. For savings accounts, use current bank interest rates.
What other financial calculators are available on Tuble.net?
The Currency Converter for international transactions and the Salary Calculator for net income after tax.
