Subtract Dates in Excel to Get Days

What this does

Excel and Google Sheets have no SUBTRACT function because the minus sign already does the job: any formula that starts with = can subtract one cell or number from another. To subtract several values at once you can chain them (=A2-B2-C2) or subtract a SUM (=A2-SUM(B2:B10)), which is tidier when the list is long. The same idea underpins a lot of everyday Excel work, so the few minutes spent getting it right here pay back across every sheet you build afterwards. Treat it as a pattern, not a one-off, and it stops being something you look up and starts being something you reach for. The difference between a quick fix and a sheet you can trust is the extra minute you spend validating “subtract dates in excel to get days”. 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 workflow that saves repeating the same clicks every week, but the practical win is that someone else can open the file and understand what happened without asking you.

A worked example

To take expenses of 120 away from revenue of 500, type =500-120 (or =A2-B2 pointing at the two cells) and press Enter — the result is 380. To subtract a whole column of costs from a budget in B1, use =B1-SUM(B2:B20). Negative results display with a minus sign automatically. Subtraction is the quiet backbone of every variance, margin and running-total formula. Knowing there is no function — only the operator — saves you hunting for one and lets you build differences directly. 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. Here is the takeaway for “subtract dates in excel to get days”: 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

• Looking for a SUBTRACT function — there is none; the − operator is the answer.
• Forgetting the leading =, so the sheet treats the entry as text.
• Subtracting cells that contain text or are blank, which can return errors or unexpected zeros.
• Mixing up the order — A2-B2 and B2-A2 differ by a sign.

Frequently asked questions