Find your total memory in Windows Settings

The fastest way to see how much memory your PC has is through Windows Settings. Open Settings by pressing the Windows key and typing "Settings," then click the Settings app. Go to System in the left menu, then select About. Look for the line that says "Installed RAM" — this is your total memory.

This number tells you the maximum amount of memory your computer can use. If it says 8 GB, your PC has 8 gigabytes of memory installed. This is the same whether you're using Windows 10 or Windows 11.

Check memory usage right now in Task Manager

To see how much memory your programs are actually using at this moment, open Task Manager. Press Ctrl+Shift+Esc on your keyboard, or right-click the taskbar at the bottom of your screen and select Task Manager. Click the Performance tab at the top.

You'll see a section labeled Memory on the left side. The top number shows how much memory is in use right now. Below that, you'll see your total memory. If it says "8.0 GB" at the top and "8.0 GB" total, you're using all your memory. If it says "3.2 GB" out of "8.0 GB," you're using 3.2 gigabytes and have 4.8 gigabytes free.

The graph next to these numbers shows your memory use over the last minute. A line that stays low means your memory is not under stress. A line that climbs to the top means programs are demanding a lot of memory.

See which programs are using the most memory

If your PC is running slowly, you may want to know which programs are eating up your memory. In Task Manager, click the Processes tab. You'll see a list of every program running right now, with a column labeled Memory showing how much each one uses.

Click the Memory column header to sort by memory use — the programs using the most will move to the top. If you see a program using more than half your total memory, that program may be the reason your PC feels slow. You can right-click any program and select End Task to close it, though be careful not to close anything labeled "Windows" or "System."

Key Takeaways

  • Your total memory appears in Windows Settings under System > About, labeled "Installed RAM."
  • Task Manager shows both your total memory and how much you are using right now, updated every second.
  • The Performance tab in Task Manager displays a graph of your memory use over time, making it easy to spot when programs demand a lot of memory.
  • The Processes tab lists every running program and shows exactly how much memory each one is using.
  • If one program is using most of your memory, closing it will free up space and may make your PC faster.

Check memory in older versions of Windows

If you're using Windows 7 or an older version, the steps are slightly different. Right-click This PC or My Computer on your desktop and select Properties. Look for "Installed RAM" in the window that opens — this shows your total memory.

To check memory use in older Windows, open Task Manager the same way (Ctrl+Shift+Esc), but click the Performance tab. You'll see memory listed as "Physical Memory" with a number showing how much is in use and how much is available.

Understand what the memory numbers mean

Memory is measured in gigabytes, written as GB. One gigabyte equals 1,024 megabytes. A PC with 8 GB of memory can hold 8 gigabytes of data at once. When you open a program, it takes up some of that space. When you close the program, that space becomes free again.

If your PC runs out of memory, Windows uses your hard drive as temporary memory, which is much slower. This is why a PC with low free memory feels sluggish. If you regularly see memory use above 80 percent of your total, your PC may benefit from more memory installed.

Frequently Asked Questions

What's the difference between memory and storage?

Memory (RAM) is fast temporary space your PC uses while programs are running. Storage is the hard drive or SSD where your files and programs live permanently. You can have 8 GB of memory but 500 GB of storage. Memory clears when you shut down; storage does not.

Is 8 GB of memory enough?

For everyday tasks like email, web browsing, and documents, 8 GB is usually enough. If you edit video, use design software, or run many programs at once, you may want 16 GB or more. Check your memory use in Task Manager while doing your normal work — if it regularly exceeds 75 percent, more memory would help.

Why does my PC show less memory than I installed?

Windows reserves some memory for itself and your graphics card. If you installed 8 GB, Windows might show 7.9 GB or 7.8 GB as usable. This is normal. If the difference is larger — for example, you installed 16 GB but see only 8 GB — one memory stick may not be seated correctly, or Windows may not recognize it.

Can I add more memory to my PC?

Most desktop PCs allow you to add more memory by opening the case and inserting new memory sticks into empty slots. Laptops are harder — some allow it, others do not. Check your PC's manual or search your model number online to see if memory is upgradeable. If you're not comfortable opening your PC, a computer repair shop can do it for you.