Autodesk Inventor Serial Number & Product Key Check

Updated 7 November 2026 · Standard formula, shown below

To check the serial number and product key for Autodesk Inventor, open the software, go to Help > About Autodesk Inventor, and click on Product Information. Alternatively, use the Windows Registry or the Autodesk Desktop App to view the currently installed serial number and product key.

Where to Find Your Serial Number and Product Key

Autodesk Inventor, like all Autodesk products, uses a serial number and product key combination for installation and activation. The serial number is typically a 9-digit number (e.g., 666-69696969), and the product key is a 5-character alphanumeric code (e.g., 208M1 for Inventor 2021). These are assigned when you purchase a subscription or perpetual license.

You can locate them in several places:

Autodesk Account: Sign in at autodesk.com/account, go to “Products & Services,” and click on your Inventor subscription to see the serial number and product key.
Autodesk Desktop App: Open the app, click on the gear icon (Settings), then “Manage” next to Inventor. The serial number appears in the “Product Details” section.
Installation Media or Email: If you purchased a perpetual license, the serial number and product key are often in the confirmation email or on the box.
Registry (Windows): For installed software, the serial number is stored in the Windows Registry under HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk\Inventor\RegistryVersion\, but this is not recommended for casual users.

How to Check in Inventor Itself

If Inventor is already installed and running, the quickest way is:

Open Autodesk Inventor.
Click the Help menu (or the “?” icon in the top-right).
Select About Autodesk Inventor.
In the dialog that opens, click Product Information.
A window shows the serial number and product key, along with the license type and expiry date (for subscription).

This method works for Inventor 2016 and later. For older versions, the path may be slightly different (e.g., Help > About, then “System Info”).

Why You Might Need to Check It

Knowing your serial number and product key is essential for:

Reinstallation: When you reinstall Inventor on a new computer, you’ll need the serial number and product key to activate it.
Troubleshooting: If activation fails, Autodesk support will ask for these details to verify your license.
License Transfer: Moving a perpetual license to another machine requires the serial number.
Updating/Upgrading: Some updates may require re-entering the product key.

Common Problems and Misconceptions

“My serial number is 000-00000000” – This usually means you’re using a trial version or the software hasn’t been activated yet. A valid serial number is never all zeros.

“I can’t find the product key for Inventor 2024” – Product keys change with each version. For example, Inventor 2020 uses 797M1, 2021 uses 208M1, 2022 uses 596M1, and 2023 uses 797M1 again. Always check Autodesk’s official product key list for your exact version.

“The serial number in the registry is different from what I see in About” – This can happen if the software was updated or if multiple versions are installed. The About dialog is the most reliable source.

How to Retrieve a Lost Serial Number

If you’ve lost your serial number, don’t worry – Autodesk provides official ways to recover it:

Sign in to your Autodesk Account.
Go to Products & Services.
Click on the product name (e.g., “Autodesk Inventor Professional 2023”).
Click View Details – the serial number will be listed.
If you don’t see it, contact Autodesk Support with your Autodesk ID and proof of purchase.

For subscription licenses, the serial number is also visible in the Autodesk Desktop App under “Manage.”

Safety and Security Considerations

Your serial number and product key are sensitive information. Treat them like passwords:

Do not share them publicly on forums or social media.
Be wary of third-party websites that offer “free” serial numbers – these are often pirated and can lead to malware or legal issues.
Autodesk will never ask you to send your serial number via email unless you initiated contact.
If you’re selling a used license, transfer it properly through Autodesk’s official process – do not just give out the serial number.

Alternative Methods for Checking

If you cannot open Inventor (e.g., it’s crashing), you can check the serial number via the Windows Registry:

Press Win + R, type regedit, and press Enter.
Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk\Inventor\RegistryVersion\.
Look for a key named SerialNumber – the value is your serial number.

Note: This method may not work for all versions, and editing the registry incorrectly can damage your system. Only use it if you’re comfortable with the Registry Editor.

Frequently Asked Questions

Q: Can I use the same serial number for multiple computers?
A: No. A serial number is tied to a single license. For subscription licenses, you can install on multiple devices but only activate on one at a time (unless you have a multi-user license).

Q: What if my product key is wrong?
A: Entering an incorrect product key will cause installation to fail. Double-check the key for your specific version – Autodesk’s official product key list is the only reliable source.

Q: Is the serial number the same as the license ID?
A: No. The serial number is a 9-digit number, while the license ID is a longer alphanumeric string used for subscription management. They serve different purposes.

Q: Can I check the serial number without opening Inventor?
A: Yes, you can use the Autodesk Desktop App, your Autodesk Account, or the Registry Editor as described above.

Q: My serial number has letters in it – is that normal?
A: No, serial numbers are purely numeric (9 digits). If you see letters, you might be looking at a product key or a different identifier.

Q: Does the product key change when I update Inventor?
A: No, the product key is specific to the version (e.g., 2021, 2022). Updating within the same version (e.g., 2021.1 to 2021.2) does not change the key.

Method: the standard formula for this calculation, rounded as each result states. See how the calculators work or report an error.