ROI Calculator
Find out what an investment actually earned you — enter the money in and the money back out, and read the return as a percentage.
How it works
ROI is just profit divided by cost. Put in $10,000, walk away with $13,500, and you've made $3,500 on the deal — a 35% return. The calculator does that division for you and shows the profit alongside it.
Percentages let you compare things of wildly different sizes. A $500 side project and a $50,000 rental can both be judged on the same scale, so a smaller bet that returns 40% beats a bigger one stuck at 12%.
Add the number of years you held it and you'll also see the annualized return. A 35% total gain sounds great until you learn it took a decade — spreading it across the years tells the honest story.
Frequently asked questions
How is ROI calculated?
Subtract your cost from your final value to get the profit, then divide by the cost. On a $2,000 investment that grows to $2,600, the $600 profit is a 30% ROI.
What's the difference between ROI and annualized return?
Plain ROI ignores time — it treats a 50% gain in one year the same as a 50% gain over ten. The annualized figure smooths the gain across the holding period so you can compare investments held for different lengths.
Can ROI be negative?
It can. If your final value comes in below what you paid, you've lost money and the ROI drops below zero. A $1,000 stake that's now worth $800 shows a -20% return.