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Kordu Tools
Finance Runs in browser Updated 08 Apr 2026

ROI Calculator

Calculate return on investment (ROI) and annualised CAGR from initial and final value.

Investment details

ROI+50.00%
Gain+5,000.00
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How to use ROI Calculator

  1. Enter initial investment

    Type the amount you originally invested or paid.

  2. Enter final value

    Type the current or final value of the investment.

  3. Add investment period (optional)

    Enter the number of years the investment was held to calculate the annualised return (CAGR).

  4. Read the results

    ROI percentage, gain or loss amount, and annualised CAGR (if period entered) are displayed instantly.

ROI Calculator FAQ

What is the ROI formula?
ROI = (Final value − Initial investment) ÷ Initial investment × 100. Example: £15,000 final value from a £10,000 investment = (£15,000 − £10,000) ÷ £10,000 × 100 = 50% ROI.

What is CAGR?
CAGR (Compound Annual Growth Rate) is the annualised ROI — the constant year-on-year growth rate that would produce the same total return over the investment period. Formula: CAGR = (Final ÷ Initial)^(1 ÷ years) − 1.

Why is CAGR useful?
CAGR lets you compare investments held for different periods on an equal footing. A 50% ROI over 5 years is a CAGR of 8.45%, while a 50% ROI over 2 years is a CAGR of 22.47% — very different performance levels.

What does a negative ROI mean?
A negative ROI means the investment lost value. If initial investment was £10,000 and the final value is £8,000, ROI is −20%.

Does this include dividends or income?
Enter the total final value including any dividends reinvested or income received. The calculator works with any monetary input — it does not distinguish between capital gains and income.

Is my data sent anywhere?
No. All calculations happen in your browser. Nothing is uploaded or stored.

Background

The Kordu ROI Calculator computes return on investment from the initial amount invested and the final value. ROI = (final value − initial investment) ÷ initial investment × 100. A negative ROI indicates a loss.

Enter an optional investment period in years to also calculate the Compound Annual Growth Rate (CAGR) — the annualised ROI. CAGR smooths out the return into an equivalent year-over-year rate: CAGR = (final ÷ initial)^(1/years) − 1. This makes it easier to compare investments held for different periods.

Common uses: evaluating stock investments, rental property returns, business project performance, marketing campaign ROI, and comparing different investment vehicles on a like-for-like basis.

All calculations run client-side in your browser. Nothing is uploaded or stored.

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