Investment Growth Calculator
Project investment growth with regular monthly contributions. Enter a starting amount, monthly deposit, return rate and years to see your final balance, total contributions, interest earned and a growth chart.
How to use this tool
- Enter starting amount, monthly contribution, annual return rate and years in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your final balance and the full breakdown beneath it.
Regular investing plus compounding is how most long-term wealth is built. This calculator adds your monthly contribution every month, compounds monthly at your expected return, and charts your balance against what you actually put in — so you can see the gap that growth creates.
Frequently asked questions
- Is the contribution added monthly?
- Yes — your monthly amount is added every month and compounds at one-twelfth of the annual rate.
- What return rate should I use?
- Long-run global stock returns have averaged roughly 7% after inflation, but future returns are not guaranteed. Try a range to see best/worst cases.