Excel Conditional Formatting Based on Another Column

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. Treat “excel conditional formatting based on another column” as a small repeatable workflow rather than a one-off click you hope to remember next time. Use a small test block before the live file, so any surprise in the affected columns shows up while it is still harmless. 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 turns a workspace setting that makes a big sheet comfortable to navigate into a method you can reuse, explain, and defend when the workbook leaves your screen.

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. If there is any chance you will reuse this, drop it into a small template tab right now: a labelled input area on the left and the formula beside it, checked once against the tool above. Next time the same question comes up, the answer is a single paste away instead of a rebuild from memory.

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. The aim was to get you unstuck fast and leave you a little more capable than a copy-paste would. The answer is at the top, the tool proves it, and the detail above shows why it holds — so the next time a colleague asks, you can answer without reaching for search. Here is the takeaway for “excel conditional formatting based on another column”: copy the answer if you are busy, but if you have a spare few minutes, rebuild the example in Excel yourself with the tool above open beside it. That single pass — type it, run it, watch the result move when you change an input — is what turns a formula you found into a technique you trust. Keep your inputs labelled and referenced, never hard-coded, and the same sheet stays correct and auditable as it grows. Done that way, you will not need to look this up again, and you will be the person others ask.

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