Investment Calculators
ROI Calculator
Calculate return on investment as a percentage and as an annualised figure, so investments held for different periods can be compared.
Return on investment
55%
- Profit
- $5,500
- Annualised return
- 15.73%
How this calculator works
ROI = (final value − cost) ÷ cost × 100
- annualised
- the constant yearly rate that produces the same result
Example calculation
Illustrative example — not advice
Worked example — the roi calculator as it loads, using the default figures below.
- 01Enter amount invested: $10,000.
- 02Enter final value: $15,500.
- 03Enter holding period: 3 years.
- 04Read the return on investment from the results panel: 55%.
Return on investment: 55%. Profit: $5,500. Annualised return: 15.73%.
These figures come straight from the calculator above running on the values listed, so you can retype them and confirm every number yourself. Change any input and the results update immediately. Illustrative only — not a quote, offer or recommendation.
Important considerations
- Ignores taxes, dealing costs and the timing of any additional contributions.
- A high ROI over a long period can be a poor annualised return.
Related calculators
- CAGR CalculatorCompound annual growth rate between two values.
- Investment CalculatorProjected value of contributions and returns over time.
- Capital Gains CalculatorTaxable gain and tax due on an asset sale.
- Stock Profit CalculatorProfit, loss and break-even price on a share trade.
- Dividend CalculatorDividend income, yield and payment per period.
- Dividend Reinvestment CalculatorGrowth of a holding when dividends are reinvested.
Terms used here
Frequently asked questions
Why annualise?
A 50% gain over one year and over ten years are very different outcomes; annualising makes them comparable.
Disclaimer
Legamoney calculators are educational tools. Results are estimates based on the figures you enter and do not constitute financial, tax or legal advice.
Last reviewed 2026-08-01