The AWS Pricing Calculator is a free cost estimate tool that can be used within your web browser without the need for an AWS Account to estimate the cost of various AWS services.
The AWS Pricing Calculator contains 100+ services that you can configure for a cost estimate.
To calculate the Total Cost of Ownership an organization needs to compare their existing cost against the AWS costs and so the AWS Pricing Calculator can be used to determine that cost.
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You can export your final estimate to a CSV.