How to Calculate ROI in Excel

What this does

ROI expresses profit as a percentage of the money you committed, so a €50 gain on €200 and a €500 gain on €2,000 are revealed as the same 25% return. It is the quickest way to rank options that cost different amounts, because it normalises every result back to "per euro invested". Keep the inputs visible and clearly labelled and the whole thing stays auditable — anyone who opens the file later, including you, can see at a glance exactly what feeds the result and change one assumption without hunting through the formula. The difference between a quick fix and a sheet you can trust is the extra minute you spend validating “calculate roi in excel”. Start on a copy or a tiny sample, keep the affected cells visible, and compare the result with the tool above before you touch the real workbook. When a formula is involved, keep the inputs labelled beside it, reference cells instead of typing values, and apply number formatting only after the result checks out. The point is a calculation you can defend to a CFO or an auditor, but the practical win is that someone else can open the file and understand what happened without asking you.

A worked example

You invest €1,000 in a project and it returns €1,250. Enter =(1250-1000)/1000 and format as a percentage: the ROI is 25%. Net profit is €250. If the return were instead €900, the formula gives -10% — a loss — which the result box flips to red so the sign is unmissable. ROI is the back-of-the-envelope test every budget owner runs first: did this spend earn its keep? Use it to triage projects before a deeper model, then switch to CAGR or NPV when timing and discounting matter. A practical tip before you scale it up: build it once on a small block of test data, confirm the number against the tool on this page, and only then point it at your real sheet. That one habit catches almost every mistake while it is still cheap to fix, long before a wrong figure reaches a report or a colleague.

In Google Sheets

If you are in Google Sheets rather than Excel, the good news is that the formula shown here is identical and the workflow barely changes — menus sit across the top instead of in a ribbon, and a few function names differ slightly, but anything you build here moves across with little or no rework. Nothing on this page is behind a login: the tool runs entirely in your browser, the formula is shown in full with one-click copy, and the steps work the same on Windows and Mac. That is the whole promise here — the exact answer, a way to prove it on your own numbers, and just enough context to make it stick. The short version of “calculate roi in excel”: the answer is at the top of this page, the tool proves it on your own numbers, and the sections above explain why it holds so the next variation does not stump you. Excel rewards people who reference cells instead of typing values and who keep inputs separate from formulas, because that is what makes a result you can audit months later. Build it once, deliberately, with the live tool as a check, and you convert a one-off lookup into a reusable skill — which is the whole point of learning the why and not just the what.

Common mistakes

• Forgetting to subtract the original investment, which reports gross return instead of ROI.
• Ignoring fees, taxes or holding time, so two ROIs are not really comparable.
• Mixing time periods — a 25% ROI over five years is not the same as 25% in one year (use CAGR for that).
• Dividing by the return instead of the investment, which understates the figure.

Frequently asked questions