Try now: Mathcad Prime 12 makes advanced calculations simpler, clearer, and more reliable, from first concept to final engineering documentation. Read more.
NOTE! It is currently not possible to start Mathcad Prime 12 on a machine with language settings in Windows set to something else than one of the ten officially supported languages: US English, French, German, Italian, Spanish, Japanese, Korean, Russian, Simplified Chinese, or Traditional Chinese. So you can either switch to any of them (probably English (United States) for our customers) or continue using Mathcad Prime 11 until PTC releases a solution for this.
This have now been fixed, and PTC released 12.0.0.1 on May 13, 2026. This version will work with all language settings.
Step-by-step instruction on how to install Prime 12.
This article assumes you already have the Prime 12 installation zip file on your computer. If you don't, please contact us. It also assumes you've received an updated license file for Prime 12 or the name of your organization's license server, and that this one is updated for Prime 12.
Locate the zip file and unzip it.
Open that folder and locate setup.exe and double click on it:
That will start the installer:
Click "Next".
Here you need to select 'I accept ...' and tick the last box. This will enable you processed to the next step:
Click "Next".
This screen can look slightly different depending on what's already installed on your computer. Normally you just click "Next".
Then you need to mark that you want the converter to be installed. Here you can also choose to install the help files locally on your computer. Else it will use the online help files.
Then click "Install" to start the installation.
That will start the installation. Now you just need to wait ...
... until it's done. Then just click the "Finish" button.
NOTE: If you get the message 'Completed, missing prerequisite', you need to install .NET 8. Click on the 'i' and follow the instructions, or see this article: Installing .NET 8.
You should now see the Prime 12 shortcut on your desktop.
You should also be able to see new items in the start menu:
Use one of these options to start Prime 12:
After a while, you'll probably see this screen. If so, jump down to 'Setting up the license'. If you just want to run this in Express mode without a license, just click "Exit" whilst you wait for a license file from us.
If you don't, it is most likely that Prime 12.0 already found a working license and you're done and can start using it:
Or Prime 12 starts in 'Express' mode:
Then you've got a license problem of some kind. If so, go to M' > Options > License and click on 'Copy All':
And then paste that information in a support case message to us.
Setting up the license
Mark that you want to 'Configure product to use existing license':
If you're using floating licenses you just enter the name of the license server or the IP address of it in the server field:
If you find yourself with a locked license, you can browse for your license file:
If you've got an old license file, remember that it must be updated to work with Prime 12. Contact us if you need an updated file.
After clicking 'Configure License' you should see:
Finally just click 'Exit' and start using Prime 12 and it will look like this: