How to get the size of an Amazon S3 bucket

size-aws-bucket.md

s4cmd is the fastest way I've found (a command-line utility written in Python):

pip install s4cmd

Now to calculate the entire bucket size using multiple threads:

s4cmd du -r s3://bucket-name

using awscli native aws s3 ls --summarize --human-readable --recursive s3://bucket-name/