About this tool
Enter an initial investment, monthly contribution, annual return and duration. Choose compounding frequency and contribution timing. Explore growth month by month, compare scenarios, and optionally adjust the final balance for inflation.
The nominal annual rate and compounding frequency determine an equivalent monthly growth rate. Monthly deposits follow the timing you select. Rates stay constant; taxes and fees are excluded. Inflation adjusts final purchasing power. Returns are estimates, not guarantees.
Use whole months, up to 100 years. Amounts are limited to 1 trillion and results to 1 quadrillion. All amounts must use the same currency.
Your numbers stay in this browser. Nothing is uploaded or saved after you leave.
Frequently asked questions
How do I use this calculator?
Enter an initial investment, monthly contribution, annual return and duration. Choose compounding frequency and contribution timing. Explore growth month by month, compare scenarios, and optionally adjust the final balance for inflation.
Which assumptions affect the estimate?
The nominal annual rate and compounding frequency determine an equivalent monthly growth rate. Monthly deposits follow the timing you select. Rates stay constant; taxes and fees are excluded. Inflation adjusts final purchasing power. Returns are estimates, not guarantees.
Are my financial details saved?
Your numbers stay in this browser. Nothing is uploaded or saved after you leave.