Answer by ThorSummoner for A standard tool to convert a byte-count into human KiB MiB etc; like du, ls1

Python tools exist

$pip install humanfriendly  # Also available as a --user install in ~/.local/bin

$humanfriendly --format-size=2048
2.05 KB
$humanfriendly --format-number=2048
2,048

I don't see a --binary flag :(, so you'd have to use python directly for binary representation:

$python -c 'import sys, humanfriendly; print(humanfriendly.format_size(int(sys.argv[1]), binary=True))' 2048
2 KiB
$python -c 'import sys, humanfriendly; print(humanfriendly.format_size(int(sys.argv[1]), binary=True))' 2000
1.95 KiB