On Windows, press Ctrl + Shift + Esc, open Task Manager, and check the Performance tab under Memory
On Windows, open Settings, go to System, then About, and look for Installed RAM
On Mac, click the Apple menu, select About This Mac, and check the Memory section
On Linux, open a terminal and run free -h
On Linux, open a terminal and run cat /proc/meminfo
On Android, open Settings, then About phone, and look for RAM or Memory
On iPhone, check the device model specifications online, since iOS does not show RAM directly in Settings
On Chromebook, open Settings and check the device information or system details
On any computer, check the system specifications on the manufacturer’s website using the model number
On any device, use a system information app or tool to view installed RAM