ROI Calculator

How to use

1. 1Pick a mode: Investment + final value for stocks and one-line trades, Cost + revenue or return for marketing campaigns and projects, or Investment + target ROI to back out the final value you need.
2. 2Enter your numbers in the visible fields. Optional Additional costs include fees, taxes, holding costs, or follow-on contributions and are added to total invested.
3. 3Optional: enter a holding period in years and months. The result panel adds annualized return (CAGR) when a period is set, so you can compare investments held for different lengths of time.
4. 4Pick a currency. Display formatting only; no FX conversion is applied. Read the headline ROI, net profit, return multiple, and annualized return.
5. 5Use Copy summary to paste a one-block report into a spreadsheet, slide, or report, or copy any individual value with the inline Copy button.

About this tool

ROI Calculator computes return on investment in your browser across three common framings. In Investment + final value mode, enter the amount you put in and what it is worth now to see ROI percent, net profit, return multiple (1.25x, 2.0x, etc.), and, when you fill in a holding period, annualized return as a compound annual growth rate (CAGR). In Cost + revenue or return mode, enter the total cost and total revenue or return for a marketing campaign, side project, or property flip; the tool keeps the same output but uses the revenue framing investors and marketers expect. In Investment + target ROI mode, enter what you plan to put in plus the ROI percent you want to hit, and the tool returns the final value you need to reach the target along with the implied profit and multiple. An optional Additional costs field rolls in fees, taxes, holding costs, and follow-on contributions so the ROI reflects the full cost, not only the headline ticket. Eight currencies (USD, EUR, GBP, CAD, AUD, JPY, INR, TRY) format every dollar, euro, yen, or rupee with the right symbol and decimal rules through Intl.NumberFormat; no FX conversion is applied because nothing is uploaded. The result panel highlights gains in emerald and losses in rose, lists every input and output with its own copy button, and offers a one-click summary copy that paste-formats cleanly into a spreadsheet, slide, or report. A reference panel at the bottom contrasts ROI percent against annualized return so you can see why a 100% total return over 10 years is only 7.18% per year, and why a 25% campaign over one quarter is not the same as a 25% return over five years. Useful for evaluating stocks, ETFs, crypto holdings, real-estate purchases, ad campaigns, course launches, restoration flips, freelance projects, capital expenditures, and any decision that asks 'did this make money'. Calculations run entirely on your device; figures, currency, and holding period never leave the browser.

Free to use. Works in your browser. No signup, no login.