Cost of at rest encryption in S3

Question

I am a volunteer for a church. We are investigating using Amazon S3 to store backup data. We have a pretty good handle on how much the storage for this backup data would be, but we also want to encrypt the data while at rest in S3. I have read a bunch about encryption charges, but am still a bit fuzzy on how to compute these costs. From what I have gathered so far, there is no charge for encrypting data while at rest in S3 if we use Amazon managed keys. Is this correct? If not, would someone summarize the factors to consider when estimating the costs of at rest encryption in S3? Thanks.

Answer

You are correct. 
Refer to this link to get an estimate of your pricing per region and usage and also the various S3 tiers.
Link- https://aws.amazon.com/s3/pricing/?p=pm&c=s3&z=4
Detailed link- https://calculator.aws/#/createCalculator/S3

Answer

I think this one will help you
https://aws.amazon.com/kms/pricing/
Check the section that explains s3 example

Answer

Thanks! I didn't find the estimator when I looked around for an answer.

Cost of at rest encryption in S3

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