While it’s helpful to have different partitions on your hard disk for different uses, you might sometimes need to merge them into a single contiguous unit. Whatever be your reason, you’re here because you’re looking to merge multiple partitions on your computer into a single unit, preferably without any data loss. So today, we will show you how to combine (merge) multiple hard disk partitions into a single unit in Windows 10 computers using a built-in Windows tool called ‘Disk Management’, a third-party app called AOMEI Partition Assistant and via the command line tool ‘DiskPart’ (command prompt or cmd).

Windows 10 offers a built-in partition management utility called Disk Management that can be used to merge or combine multiple partitions. However, you can also use third-party tools and even use the command prompt (cmd) to merge disk partitions in Windows 10. There are different pros and cons for each method, and here we will tell you exactly which method is suitable for what purpose. So without further delay, let’s see the various methods by which you can combine (merge) multiple partitions into a single contiguous unit and expand an existing partition in Windows 10.

  • Things to Remember Before You Merge Partitions in Windows
  • Method 1: Merge Partitions Using Disk Management
  • Method 2: Merge Partitions Using Third-party App
  • Method 3: Merge Partitions Using DiskPart

Things to Remember Before You Merge Partitions in Windows

You can easily partition your HDD or SSD using a built-in Windows tool called Disk Management. It can perform basic tasks like delete, format and create new volumes, all of which are needed to handle the storage structure of a PC. However, there’s no actual ‘Merge’ functionality in Disk Management. Instead, one can increase the size of a partition (volume) by adding unallocated adjacent space to the right. Another major drawback of the Disk Management tool is that you need to delete all data in the add-on space to be able to merge it with another partitions.

Method 1: Using Disk Management (Data Loss)

This method will cause you to lose the data so create a full backup of Windows 10 before proceeding with this method.

  • Now right-click on volume D: and click on ‘Extend Volume’.

Method 2: Using Third-party App (Without Data Loss)

Note: We’re using AOMEI Partition Assistant for this demo, but most of the other programs on our list, including the ones mentioned above, support the ‘merge’ function.

You can also use the command line (cmd) tool, DiskPart, to merge two partitions in Windows 10. Here’s how you do it:

  • Type ‘diskpart.exe’ (without quotes) in the Windows Search Bar and hit Enter.

  • Finally, type ‘extend’ to extend this partition. You should get the message ‘DiskPart successfully extended the volume’.

You now know how to merge or combine partitions on your Windows 10 computer using the built-in Disk Management tool, the command line (DiskPart), as well as using third-party apps like AOMEI Partition Assistant without losing data. Meanwhile, since you’re already interested in partition management, you should also check out how to convert your hard disk partition style from MBR to GPT. You should also go through our detailed explainer on the difference between BIOS and UEFI for a more holistic understanding of how your computer works under-the-hood.