Conditional Formatting Formula

What this does

Conditional formatting applies a fill, font or border automatically while a condition is true and removes it when it stops being true. The built-in presets cover simple cases; a formula rule handles everything else, including formatting a cell based on another cell. Excel evaluates the formula once per cell in the Applies to range, shifting relative references as it moves — so the $ anchors decide what each cell actually tests. 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. For “conditional formatting formula”, the reliable version is a short checking loop, not just the first command that appears to work. Run it on a deliberately small range first, watch how the affected formula change, and only then apply the same setup to the full sheet. 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. That is what makes a workspace setting that makes a big sheet comfortable to navigate useful in real work: repeatable, auditable, and not dependent on memory or luck.

A worked example

Orders sit in A2:D10 with amounts in column B: B2 is 150, B3 is 80, B4 is 230. Select A2:D10, add the formula rule =$B2>100 and pick a green fill. Rows 2 and 4 turn green across all four columns; row 3 stays plain. $B locks the column while the row number stays relative, so every cell in a row tests its own row’s B value — B$2 would instead compare everything against row 2. A formula rule keeps status visible without manual recoloring: overdue rows, high amounts or matching text get marked the moment the data changes. 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. If you take one thing from this page on “conditional formatting formula”, make it the habit rather than the keystrokes: set the problem up with labelled inputs, reference those cells, and let Excel do the recomputing. Bookmark the page for the syntax, but do the example once in a blank sheet and check it against the tool above — five minutes of hands-on practice fixes the method in memory far better than re-reading, and it surfaces the small snags while they are still harmless. After that the technique is genuinely yours: faster than searching for it again, and reliable enough to drop into work that other people depend on.

Common mistakes

• Writing $B$2 instead of $B2, so every row tests the same single cell.
• Using B$2 for a row-wise rule — that locks the row, not the column.
• Writing the formula for the wrong cell: it must evaluate for the top-left cell of the Applies to range.
• Letting an earlier rule mask a later one instead of reordering in Manage Rules or using Stop If True.
• Comparing text values with > and expecting numeric behavior.

Frequently asked questions