How to Get Time Difference in Excel

What this does

Excel stores a time as a fraction of a day: 06:00 is 0.25, 12:00 is 0.5. Subtracting two times therefore gives a fraction of a day, and the formatting decides what you see. The square brackets in [h]:mm are the critical part — plain h:mm resets to zero after 24 hours, so a 30-hour total displays as 6:00, which is the classic wrong timesheet. Multiplying the difference by 24 converts it to decimal hours (7.5 rather than 7:30), which is what payroll arithmetic needs. A shift crossing midnight makes the subtraction negative; =MOD(End-Start, 1) handles it by wrapping into the next day. And where the two moments fall on different DATES, store date and time together in one cell — subtracting a bare 09:00 on Tuesday from a bare 17:00 on Monday cannot possibly know a day passed. 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 “get time difference in excel”, 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 cells 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 workflow that saves repeating the same clicks every week useful in real work: repeatable, auditable, and not dependent on memory or luck.

A worked example

Start 09:15 in B2, end 17:45 in C2. =C2-B2 formatted as [h]:mm shows 8:30. =(C2-B2)*24 formatted as a number shows 8.5 — the figure to multiply by an hourly rate. A night shift with start 22:00 and end 06:00: =C2-B2 shows ###### or a negative; =MOD(C2-B2, 1) shows 8:00. Timesheet arithmetic fails in exactly two ways — the 24-hour wrap and the midnight crossing — and both are one formatting choice and one MOD away from being right. 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

Everything above works in Google Sheets too. Excel and Sheets share the formula syntax used here; only the surrounding menus are arranged differently. That portability is deliberate — learn it once and it follows you between the two tools and across Windows and Mac. 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. Treat “get time difference in excel” as a small building block rather than a chore. Once the inputs sit in their own cells and the formula reads from them, the same setup answers a dozen related questions with a tweak, and Excel keeps every dependent figure current as the data changes. The tool above is there so you can rehearse and verify before committing anything to a real workbook; the steps and worked example are there so the logic sticks. Get it right once and it stops costing you time — it starts saving it, every time the question comes back around.

Common mistakes

• Formatting a total as h:mm rather than [h]:mm, so anything over 24 hours silently wraps.
• Subtracting bare times across midnight and getting ###### or a negative number.
• Paying against a time value directly — 8:30 as a number is 0.354, so it must be multiplied by 24 first.
• Entering times as text, which right-alignment (or the lack of it) reveals immediately.
• Summing a column of daily durations without the bracket format, which is where the wrong weekly total comes from.

Frequently asked questions