Get the total size and number of objects of a AWS S3 bucket and folders

Warning❗️Though AWS Cloud is pay as you go! If the number of objects in your bucket is too many, you could incur a significant cost, so be mindful that per 1,000 S3 LIST requests you will incur a cost of $0.005. Each LIST request gets around 1,000 object details.

Get Total Size and Object count of AWS Bucket using AWS Console

1. Login to your AWS Web Console.
2. Navigate to S3 Console: https://s3.console.aws.amazon.com
3. Now click on the bucket name that you want to know the size.
4. Now select all objects by checking the top most checkbox,
   
5. Under Actions select: "Calculate total Size"
   

Note that the total size information will no longer be available after you navigate away from this page - so you can take a note of the total object count and its size.

Get Total Size and Object count of AWS Bucket using AWS CLI Command

1. Open your terminal/command prompt (make sure you have set the AWS keys using aws config)
2. Now make use of the S3 ls command with the below options,

   # aws s3 ls s3://c2c-bucket-1 --recursive --human-readable --summarize
   2022-08-17 00:17:46    0 Bytes myfiles/a.txt
   2022-08-17 00:17:46    0 Bytes myfiles/b.txt
   2022-08-17 00:17:46   13 Bytes test.txt
   2022-08-17 00:17:46    0 Bytes test2.txt
   
   Total Objects: 4
   Total Size: 13 Bytes

3. Make a note of Total Size displayed in Bytes/KibMib/Gib/Tib/iPb