HD DVD (short for High-Definition/Density DVD) is a defunct high-density optical disc format for storing data and high-definition video. Supported principally by Toshiba, HD DVD was envisaged to be the successor to the standard DVD format. Blu-ray, also as high definition standard, is the rival of HD DVD. HD DVD and Blue Ray are not compatible with each other. If you want to convert HD DVD to Blueray, HD DVD to Blue Ray Creator can help you.
There are two ways for you to convert HD DVD to Blue Ray: you can copy HD DVD to Blue Ray directly or convert HD DVD image to Blue Ray. You can use HD DVD to Blue Ray Creator to create Data CD/DVD/Blu-Ray, burn DVD to BlueRay and Create Boot CD/DVD. You can also use it to copy CD/DVD/HD DVD to Blue Ray. What's more, HD DVD to Blue Ray Creator offers you the appropriate option for you to erase Disc, get drive info.
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Guide: How to use the HD DVD to Blue Ray CreatorPreparations: 
Free download HD DVD to Blue Ray Creator, install and run.
Way 1: Copy HD DVD to Blue Ray
1. Click Copy tag and then choose the Copy Blu-Ray option to open the copy window.
2. Input the HD DVD and choose the Blue Ray as output. Click 
to begin to copy HD DVD to Blue Ray.
Way 2: Burn HD DVD Image to Blueray.
1. Click Copy tag and then choose the Burn Disc Image to Blu-Ray option.
2. You should first insert Blu-Ray into your drive, which you would like to burn a disc image to. After that the optical disc inserted into the drive will be automatically detected and opened.
3. Then add a disc image to the Files List area using the 
button at the bottom of the window or the Express Menu.
4. Select 
option to begin writing the selected disc image to the inserted disc.
Note 1: You can also make sure that all the data fit to the inserted disc on the Disc Size Meter.
Note 2: If your rewritable CD/DVD/Blu-Ray that you'd like to use for burning disc image onto is not empty, you can erase all the data from it using the Erase button at the bottom of the task window or the Express Menu. To learn more about this process please click here.