In Excel: put time or ordered categories in the first column, values in the next column, select both, then Insert ▸ Line or Area Chart ▸ Line.
Arrange the x-axis labels in the first column and the values in the next column.
Select only the label and value range, excluding totals.
Choose Insert ▸ Line or Area Chart ▸ Line.
Add a chart title, axis labels and markers when the individual points need to be visible.
What this does
A line graph connects values in order, usually across time, so the slope makes direction and change visible. The first column should hold dates, months or ordered categories; the second holds the values to plot. Excel treats each additional numeric column as another line, which is useful for comparing series but messy if totals or helper columns are accidentally selected. Most people learn this as a sequence of clicks and forget it by next week; learning it as a pattern instead is what lets you apply it to the next, slightly different version of the problem without starting from scratch. That is the difference this page is trying to make. Treat “plot a line in excel” 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 cells shows up while it is still harmless. When this is a ribbon command, the selection matters more than the button: confirm the range, apply the command, then spot-check the output before saving. That turns a visual that makes the number obvious at a glance into a method you can reuse, explain, and defend when the workbook leaves your screen.
A worked example
Months Jan through Jun are in A2:A7 and sales 42, 51, 48, 61, 67, 73 are in B2:B7. Select A2:B7, choose Insert ▸ Line Chart, and Excel draws a six-point line rising from 42 to 73. Add markers if individual months matter, and format the vertical axis to start at zero only when that supports the story rather than flattening the change. Line graphs are strong for trends: monthly sales, weekly traffic, running totals, error rates, production output and any metric where readers need to see direction over a sequence. 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. Keep this page bookmarked for the next time the same question comes up. Better still, rebuild the example once in your own sheet — doing it yourself, with the tool above to check against, is what turns a copied formula into a technique you own. If you take one thing from this page on “plot a line in excel”, 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
- Using a line chart for unordered categories, where a bar chart would compare values more honestly.
- Including a total row, which creates a sudden fake spike at the end.
- Letting Excel treat text dates as categories; convert them to real dates when spacing matters.
- Plotting too many series at once, turning the chart into unreadable crossing lines.
Frequently asked questions
When should I use a line graph?
Use it for ordered data, especially time series, where the change from one point to the next matters.
How do I add a second line?
Place the second value series in another column beside the first, include it in the selected range, and Excel plots it as a separate line.
Line chart or scatter plot?
Use a line chart for ordered categories or dates; use a scatter plot when both axes are numeric measurements.