ROI Calculator
Calculate return on investment as a percentage, plus profit and annualised return.
Results update as you type.
About this calculator
Return on investment (ROI) measures the gain or loss on an investment relative to what you put in, expressed as a percentage. This calculator shows the simple ROI, the raw profit, and the annualised (compound) return so you can compare investments held for different lengths of time on an equal footing.
Frequently asked questions
How is ROI calculated?
ROI = (final value − amount invested) ÷ amount invested × 100. Turning 1,000 into 1,500 is a gain of 500, so ROI = 500 ÷ 1,000 × 100 = 50%.
What is annualised return and why does it differ?
Annualised return spreads the total gain evenly across each year using compounding: ((final ÷ initial)^(1 ÷ years) − 1) × 100. A 50% total return over 5 years is only about 8.4% per year, which is the fairer number for comparing holdings of different lengths.
Results are estimates for general guidance only, not financial, medical or tax advice.