how much space left for the user linux code example

Example: how much space left for the user linux

df -H 

output : 
Filesystem      Size  Used Avail Use% Mounted on
udev            3.9G     0  3.9G   0% /dev
tmpfs           791M  9.4M  782M   2% /run
/dev/sda8       412G   17G  374G   5% /
tmpfs           3.9G  204M  3.7G   6% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           3.9G     0  3.9G   0% /sy/dev/loop13      65M   65M     0 100% /snap/gtk-common-themes/1514
/dev/sda6       481G  450G  6.5G  99% /home  ###################################
/dev/loop16     6.4M  6.4M     0 100% /snap/rclone/466
/dev/sda1       453M  193M  234M  46% /boot
tmpfs           791M   52K  791M   1% /run/user/1002
s/fs/cgroup