Investment Growth Calculator
Six tools in one: compound growth with contributions, monthly investing (dollar-cost averaging), CAGR, ROI, the Rule of 72, and how much fees quietly cost you over time.
Your numbers
Growth over time
Where the money comes from
Yearly breakdown
| Year | Invested | Interest | Balance |
|---|
Invest the same amount regularly
Dollar-cost averaging means investing a fixed amount on a regular schedule, smoothing out the ups and downs of the market.
Invested vs value
Compound annual growth rate
Return on investment
How long to double your money?
The Rule of 72 is a quick shortcut: divide 72 by your annual return to estimate the years it takes your money to double.
What do fees really cost?
With fees vs without
How it works
Every mode here is built on compound growth - the idea that your returns themselves earn returns. The difference is just the question you're asking.
A = P (1 + r/n)nt
Compound growth projects a lump sum plus regular contributions. Monthly investing shows the same idea for steady deposits (dollar-cost averaging). CAGR and ROI measure a return you've already earned, Rule of 72 estimates doubling time, and Fee impact compares your balance with and without annual fees.