Knowing whether an investment actually paid off requires more than looking at how much it grew — you need to measure the return relative to what you put in and how long you held it. This calculator computes your total return on investment (ROI) and your annualized return so you can compare investments on an equal footing.
How returns are calculated
Total ROI is (final value − initial value) ÷ initial value × 100, expressed as a percentage. Annualized return converts that total into an equivalent yearly rate using the holding period, which lets you fairly compare an investment held two years against one held ten.
Why annualized return matters
A 50% total return sounds great, but if it took ten years to achieve, the annualized return is only about 4%. Annualizing strips out the effect of time so you can see which investment truly grew faster per year — the number that matters when comparing opportunities.
A worked example
You invest $10,000 and it grows to $16,000 over five years. Your total ROI is 60%, but your annualized return is about 9.9% per year. That annual figure is what you would compare against the roughly 10% long-run average of the S&P 500 to judge performance.
Interpreting your results
- Compare annualized returns, not total returns, when investments were held for different lengths of time.
- Remember to account for fees and taxes, which reduce your real net return.
- Adjust for inflation to understand your true increase in purchasing power.
- Past returns do not guarantee future results — use them to compare, not to predict.