Formula
ROI = (Return − Investment) ÷ Investment
FAQ
ROI vs ROAS?
ROAS compares revenue to ad spend specifically. ROI compares net gain to total investment and applies to anything.
Should returns be annualized?
For investments spanning different timeframes, yes — 50% ROI over 5 years is worse than 30% over 6 months. This calculator gives the raw, non-annualized ROI.