On Windows, open Settings > System > About and look for Installed RAM
On Windows, press Ctrl + Shift + Esc, open Task Manager, and check the Performance > Memory tab
On Mac, click the Apple menu > About This Mac and look for Memory
On Linux, open a terminal and run free -h
On Linux, open a terminal and run cat /proc/meminfo
On ChromeOS, open Settings > Device > About ChromeOS and check system memory details
On iPhone or iPad, RAM is not shown directly in Settings
On Android, use Settings > About phone and check device specifications if available
On Android, install a system info app to view RAM details if the device settings do not show it