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CAGR Calculator: Compound Annual Growth Rate

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 with the annualized result in front: enter what the investment was worth at the start, what it is worth now and how many years passed, and the compound annual growth rate leads the output.

CAGR answers a different question than total return. Doubling your money sounds great, but over five years it is 14.87% per year and over twenty years only about 3.5% — CAGR is the smoothed yearly rate (final/initial)^(1/years) − 1 that makes investments with different time spans comparable.

The calculator also prints the total ROI, the absolute profit and how long money needs to double at that rate — everything computed locally in your browser, with plain numbers that work in any currency.

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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.