Investment Calculator
Determine the future value of your investments. Whether you're saving for a big purchase or building long-term wealth, our calculator shows how your money grows over time with compounding interest.
What is an Investment Calculator?
An investment calculator is a tool that helps you project the growth of your money over a specific period. It takes into account your starting balance, regular contributions, and the power of compound interest to show you how your wealth can accumulate.
Why Use an Investment Calculator?
- Visualize Growth: See the impact of compounding over long periods.
- Compare Strategies: Test how different contribution amounts or return rates affect your final balance.
- Financial Planning: Determine how much you need to invest monthly to reach a specific goal.
- Education: Understand the difference between simple and compound interest.
Limitations
Keep in mind that investment projections are estimates:
- Market Risk: Real-world returns fluctuate and are not constant.
- Taxes and Fees: This calculator does not account for capital gains taxes or investment management fees.
- Inflation: The purchasing power of your future value will be lower than today's dollars.
The Formula
Compound Interest Formula:
A = P(1 + r/n)^(nt) + PMT * [((1 + r/n)^(nt) - 1) / (r/n)]
Where:
A = Future Value
P = Initial Investment
r = Annual Interest Rate
n = Compounding periods per year
t = Number of years
PMT = Monthly contribution
A = P(1 + r/n)^(nt) + PMT * [((1 + r/n)^(nt) - 1) / (r/n)]
Where:
A = Future Value
P = Initial Investment
r = Annual Interest Rate
n = Compounding periods per year
t = Number of years
PMT = Monthly contribution
Frequently Asked Questions
What is compound interest?
Compound interest is interest calculated on the initial principal, which also includes all of the accumulated interest from previous periods.
How often should I compound?
The more frequently interest is compounded, the faster your investment grows. Most savings accounts compound daily or monthly.
What is a realistic return rate?
Historically, the stock market (S&P 500) has returned about 7-10% annually before inflation. Conservative investments like bonds may return 3-5%.
Should I include taxes in my calculation?
This calculator shows pre-tax growth. Depending on your account type (like a 401k vs. a brokerage account), you may owe taxes on your gains.
What is ROI?
ROI stands for Return on Investment. It's a percentage that shows the total profit relative to the total amount invested.