ROI Calculator
Calculate Return on Investment as a percentage of cost.
About this calculator
The ROI Calculator on NumberCals is a free, mobile-friendly tool for anyone needing to calculate return on investment as a percentage of cost. Enter your values in the form below and the result is computed instantly — no sign-up, no installation, no waiting.
Formula used
ROI = ((Final Value − Cost) / Cost) × 100
What you'll need
- Initial Investment (Cost) (e.g. 10000)
- Final Value (e.g. 13500)
What you'll get
- Net Gain / Loss
- ROI (%)
Formula
ROI = ((Final Value − Cost) / Cost) × 100
Result
Frequently Asked Questions
What is a good ROI? +
It depends on the asset class and timeframe. Equities historically average ~7–10% annually after inflation; a 'good' ROI must beat the risk-free rate plus a premium for the risk taken.
Does ROI account for time? +
No — ROI is a single-period return. For annualised returns over multiple years, use CAGR.
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