ROI Calculator
Calculate return on investment, total gain, and annualized ROI from any investment.
Understanding the profitability of an investment is essential for making informed financial decisions. Geekflare ROI Calculator tells you how profitable an investment was and how fast it grew each year. Enter your initial investment, the amount it grew to, and how long you held it to get ROI, total gain or loss, and annualized return.
ROI formula
ROI measures total profit or loss as a percentage of what you put in:
ROI = ((Final amount − Initial investment) / Initial investment) × 100If you invested $10,000 and it grew to $15,000, the ROI is 50%.
Annualized ROI formula
Annualized ROI converts a total return into a yearly compound rate, making it possible to compare investments held for different lengths of time:
Annualized ROI = (Final amount / Initial investment) ^ (1 / years) − 1A 50% total return over 3 years equals about 14.47% per year. The same 50% over 5 years is only 8.45% per year — context matters.
When to use each metric
| Metric | Best for |
|---|---|
| ROI % | Comparing total profit across investments of the same duration |
| Total gain / loss | Seeing the absolute dollar impact |
| Annualized ROI | Comparing investments held for different time periods |
Reading a negative ROI
A negative ROI means the final amount is less than the initial investment — a loss. The result table labels it as "Total loss" and displays the annualized ROI as a negative percentage. If the final amount is zero, annualized ROI shows N/A because the compound formula breaks down at zero.
Holding period and precision
Enter years and months separately. The calculator converts months to a decimal fraction of a year before computing the annualized rate. Leaving the period blank or at zero skips the annualized calculation and shows N/A — you still get ROI and total gain.