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Annualized Return Calculator

Calculate the return on any investment: total ROI %, profit, annualized CAGR and the doubling time by the rule of 72 next to the exact answer.

Leave the years empty to get only the total return; fill them in (decimals allowed) to also get the annualized CAGR and doubling time.

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Reading the investment values
Computing the total return
Annualizing the growth rate

Result

This page opens the ROI calculator set up to annualize a result: type in what you started with, what you ended with and the holding period, and the per-year rate is the first number you see.

Annualizing matters whenever time spans differ. A 40% gain in three years and a 60% gain in five years look incomparable until both are turned into yearly rates — 11.87% and 9.86% — and suddenly the slower-sounding investment is the better one. Fractional periods work too: 18 months is simply 1.5 years.

Alongside the annualized rate you get the total ROI, the profit and the doubling time at that pace, all computed in your browser without any data leaving it.

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Accepted Formats & Rules

  • Total ROI % = (final − initial) / initial, plus the absolute profit or loss.
  • Annualized CAGR = (final/initial)^(1/years) − 1 whenever you enter the holding period, fractional years included.
  • Doubling time two ways: the rule-of-72 estimate (72 / rate) side by side with the exact ln 2 / ln(1 + r).
  • Handles losses honestly: negative ROI and CAGR are shown, and doubling time is marked as not applicable.

Key Benefits

✓ See the total return and the yearly growth rate of the same investment in one shot — the two numbers people most often mix up.
✓ The rule-of-72 estimate is printed next to the exact logarithmic doubling time, so you know how much the shortcut is off.
✓ Plain numbers in, plain numbers out: works with any currency, and nothing leaves your browser.

Use Cases

  • • Check the real yearly return of an investment you have held for several years, not just the total gain.
  • • Compare two investments held for different lengths of time by turning both into annualized CAGR.
  • • Estimate how long your portfolio needs to double at its current growth rate — rule of 72 next to the exact answer.
  • • Verify a fund's advertised annualized return from its start and end values.