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To calculate the total cost for this scenario, we add the cost for Amazon S3, Amazon CloudFront, Amazon EC2, Amazon RDS, and the AWS Data Transfer Out, and subtract any discount that falls into the AWS Free Usage Tier.
The total AWS Transfer Out is an aggregate Data Transfer Out usage across Amazon EC2, Amazon S3, and Amazon RDS. For Amazon EC2, we have 0.05 GB per day which is approximately 1.525 GB per month. For Amazon S3, we have 0.1 GB per month, and for Amazon RDS we did not have any AWS Transfered out. Since up to 1 GB per month of data transfered out is free, we are left with a total of 0.625 GB per month.
| Variable | Formula | Calculation |
|---|---|---|
|
AWS Data Transfer |
(Data in (GB) X Data In Rate) + (Data out (GB) X Data Out Rate) --------------------------------- |
0.1525 X $0.00 + (0.625) X $0.12 ----------------- $0.08 |
The following image shows an example of your monthly estimate.

The total cost of this web application is estimated at $165.37 per month including the free tier discount.