📐 ROI Calculator
Calculate return on investment for any project, purchase, or campaign — with optional annualized ROI.
How the ROI Calculator Works
Return on investment (ROI) compares what you got back with what you put in. It works for almost anything: a marketing campaign, a piece of equipment, a renovation, a course, or a resale item. Enter the total amount invested (including costs such as fees and shipping) and the total amount returned (sale price, revenue, or savings), and the calculator shows the net gain or loss and the ROI percentage.
A 50% ROI over one year is much better than 50% over five years, so if you add how long the investment lasted, the calculator also shows the annualized ROI — the equivalent yearly rate. For comparing growth of an investment between two values over time, see the CAGR calculator.
Formula
Net gain = amount returned − amount invested ROI (%) = net gain ÷ amount invested × 100 Annualized ROI (%) = ((amount returned ÷ amount invested)^(1 / years) − 1) × 100
How to Use It
- Enter the total amount invested, including all costs.
- Enter the total amount returned or recovered.
- Optionally enter how long the investment lasted, for the annualized ROI.
- Read the net gain and ROI.
Frequently Asked Questions
How do you calculate ROI?
ROI = (amount returned − amount invested) ÷ amount invested × 100. If you spend 2,000 and get back 2,600, the net gain is 600 and the ROI is 30%.
What is a good ROI?
It depends on the risk and the alternatives. A useful habit is to compare an investment's annualized ROI with what you could earn from a low-risk option over the same period, and to remember that higher expected returns usually come with higher risk.
What is the difference between ROI and annualized ROI?
ROI is the total return over the whole period, regardless of how long it took. Annualized ROI converts it to an equivalent yearly rate, which makes investments of different lengths comparable.
Related Calculators
- 📈 CAGR Calculator — Find your investment's true annualized return.
- 📊 Break-Even Point Calculator — How many units do you need to sell before your side business profits?
- 🏷️ Markup & Margin Calculator — Find your selling price, or check your real profit margin.
- 💹 Simple Interest Calculator — Interest and total amount for any principal, rate, and time — any currency.
Formula and content last reviewed: September 2026. All calculations run in your browser — nothing you enter is sent to or stored on our servers.
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See all →✔ Reviewed by GelirLab Editöryal Ekibi · Last reviewed: September 2026 · How we check our calculators