ROI Calculator (Return on Investment)

What is my return on investment, in total and per year?

Single calculationv1.0.0Verified 2026-11-01Runs in your browser

Spec sheet

roi · v1.0.0

Method

ROI and annualized ROI

01ROI = (returned − invested) ÷ invested
02annualized = (returned ÷ invested)^(1/years) − 1

Limits — read before relying on it

Ignores the timing of intermediate cash flows; use NPV/IRR for those.

Sources

Return on investment (standard definition)textbook

Worked example

computed by the same formula

$10k → $14.5k in 3 years

Inputs

Amount invested: 10000
Amount returned (final value): 14500
Holding period: 3 years

Result

ROI: 45 %
Gain: $4,500.00
Annualized ROI: 13.19 %

Questions

How is the roi calculator calculated?

›

ROI and annualized ROI. ROI = (returned − invested) ÷ invested · annualized = (returned ÷ invested)^(1/years) − 1

Example: $10k → $14.5k in 3 years?

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ROI: 45 %; gain: $4,500.00.

What does this calculator not cover?

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Ignores the timing of intermediate cash flows; use NPV/IRR for those.

Where do the numbers come from?

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Sources: Return on investment (standard definition). The formula is versioned (roi v1.0.0) and covered by automated tests.

Is my data stored?

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No. The calculation runs in your browser and nothing is sent unless you choose to save a shareable link.

Also searched asroi calculator · return on investment · calculate roi · annualized return · investment return percentage

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CAGR Calculator (Compound Annual Growth Rate)

What compound annual growth rate takes a value from A to B over N years?

(end/start)^(1/n) − 1