Where to find your Excel version number

The fastest way to find your Excel version is to open Excel, click the File menu, then select Account. On the right side of the screen, you'll see About Excel near the top. Click it, and a window pops up showing your exact version number, build number, and whether you're running a 32-bit or 64-bit installation.

If Excel is already open with a document, this takes about 10 seconds. If you need to find the version before opening a file, the same steps work — just launch Excel first, even if you don't open anything.

The version number appears as a four-digit code like "2404" or "2311". The first two digits are the year, and the second two are the month. So version 2404 means April 2024. Older versions show as "2019", "2016", or "Office 365" depending on when you bought it.

Key Takeaways

  • Open Excel, click File, then Account, then About Excel to see your version number in seconds.
  • The version number format shows the year and month — 2404 means April 2024.
  • Mac users follow the same path: Excel menu, then About Excel.
  • If you're using Excel through Microsoft 365 subscription, your version updates automatically and the number changes monthly.
  • The build number shown in the About window tells you the exact update level, which matters when troubleshooting specific bugs.

Finding your version on a Mac

On Mac, the process is nearly identical. Open Excel, then click the Excel menu at the very top left of your screen (not File). Select About Excel from the dropdown. The version window appears immediately with the same information: version number, build number, and whether you're on the latest update.

Mac users on Microsoft 365 subscriptions see the same monthly version updates as Windows users. If you bought Excel as a one-time purchase (Excel 2019 or earlier), your version number stays the same unless you manually run updates through the Mac App Store or Microsoft's AutoUpdate tool.

What the version number actually tells you

The four-digit version number is the most important piece of information. It tells you whether you have access to newer features, whether your file format is compatible with other users' versions, and whether you need to update to fix a known problem.

Version 2404 and newer support all current Excel features. Version 2311 and earlier are still supported but may lack features added in recent months. Versions older than 2019 are no longer receiving updates from Microsoft, which means security fixes and bug patches stop arriving.

The build number (the longer number shown below the version) is less important for everyday use, but it matters if you're troubleshooting a specific bug. When you contact Microsoft support or search for a known issue, the build number helps narrow down whether the problem has already been fixed in a newer build.

Checking if you're on Microsoft 365 or a one-time purchase

The About Excel window also tells you which type of Excel license you own. If it says "Microsoft 365" or "Office 365", your subscription renews monthly and your version updates automatically. If it says "Excel 2019" or "Excel 2021", you bought a one-time license that doesn't update unless you manually trigger it.

Microsoft 365 subscribers always have the newest version available. One-time purchase owners stay on the version they bought until they choose to upgrade to a newer year (like moving from 2019 to 2021). This affects which features you can use and whether files created in newer versions will open properly on your machine.

Why you might need to know your version

Knowing your Excel version matters in three common situations. First, when you're opening a file someone else created, an older version of Excel may not support newer features like dynamic arrays or certain chart types. Second, when you're troubleshooting a problem, support staff or online forums need your version to know whether the issue is already fixed. Third, when you're deciding whether to update, knowing your current version helps you understand what features you're missing.

If someone sends you a file created in version 2404 and you're running version 2311, some formulas or formatting might not display correctly. Knowing your version number lets you ask them to save it in a compatible format, or it tells you that updating would solve the problem.

Updating Excel after you find your version

If you discover you're running an older version, the update process depends on your license type. Microsoft 365 subscribers can force an update by going to File, then Account, then clicking Update Options and selecting Update Now. The update usually takes 5 to 15 minutes and requires restarting Excel.

One-time purchase owners (Excel 2019, 2021) don't receive monthly updates. Instead, they get occasional security patches. To move to a newer version, you must buy a new license. Microsoft 365 is the subscription model that keeps your version current automatically.

Frequently Asked Questions

What's the difference between version number and build number?

The version number (like 2404) tells you the release month and year. The build number is a longer code that shows which specific update within that month you're running. Both are shown in the About Excel window, but the version number is what most people need to know.

Why does my Excel version keep changing every month?

If you have a Microsoft 365 subscription, Excel updates automatically every month with new features and security fixes. This is normal and expected. One-time purchase versions (2019, 2021) stay the same unless you manually update or buy a newer license.

Can I use an Excel file created in a newer version if I have an older version?

Sometimes. If the file uses only basic features, it usually opens fine. But if it uses newer features like dynamic arrays or certain functions added after your version, those parts won't work correctly. The file may open, but formulas might show errors or formatting might look wrong.

Is there a way to see my Excel version without opening the program?

Not easily. You need to open Excel itself to access the About window. However, if you right-click an Excel file and check Properties (Windows) or Get Info (Mac), you might see version information, though it's often incomplete or unclear.

Do I need to update Excel if I'm running an older version?

If you have Microsoft 365, updates happen automatically and you don't need to do anything. If you have a one-time purchase and it's older than 2019, you're no longer receiving security updates, which means updating to a newer version is worth considering for safety reasons.