ROI Calculator

Measuring return on investment

ROI expresses profit as a percentage of what you put in: (final − cost) ÷ cost × 100. It's a quick, universal way to compare investments — but it ignores time, so a 50% return over one year is far better than 50% over ten. The annualized figure (compound annual growth rate) corrects for that by spreading the return across the holding period. All math runs locally in your browser.