How do I find the total size of my AWS S3 storage bucket or folder?

Question

Does Amazon provide an easy way to see how much storage my S3 bucket or folder is using? This is so I can calculate my costs, etc.

Answer 1

s3cmd du --human-readable --recursive s3://Bucket_Name/

Answer 2

Answer adjusted to 2020: Go into your bucket, select all folders, files and click on "Actions"->"Get Total Size"

Answer 3

Two ways,

Using aws cli

aws s3 ls --summarize --human-readable --recursive s3://bucket/folder/*

If we omit / in the end, it will get all the folders starting with your folder name and give a total size of all.

aws s3 ls --summarize --human-readable --recursive s3://bucket/folder

Using boto3 api

import boto3

def get_folder_size(bucket, prefix):
    total_size = 0
    for obj in boto3.resource('s3').Bucket(bucket).objects.filter(Prefix=prefix):
        total_size += obj.size
    return total_size

Answer 4

Found here

aws s3api list-objects --bucket cyclops-images --output json --query "[sum(Contents[].Size), length(Contents[])]" | awk 'NR!=2 {print $0;next} NR==2 {print $0/1024/1024/1024" GB"}'