Keep in mind that prices are likely different in each AWS region! Estimating price dimension usage Check out the following pricing pages to get a sense of the differences between services: There are no shortcuts if you need an accurate cost calculation. I recommend you to read them from top to bottom. Understanding the pricing modelsĮach AWS service has a pricing page. Once you know what AWS services are used, you can familiarize yourself with the pricing models of each service. IAM policies provide a hint of what APIs are called. VPC Flow Logs can be helpful to understand communication paths. I recommend diving as deep as possible to understand what’s going on. I usually start by looking at the architecture diagram. What AWS services are used? How are the services used? What communication paths exist? What data is processed and stored? What are data retention policies? And many more questions. To calculate costs, you need a detailed understanding of the architecture. In this blog post, I share the tools and techniques I use to calculate AWS costs. How much traffic does your application process? How many requests to S3 do you plan to make? The second step is usually the more challenging part. After you understand the pricing model, you have to come up with the numbers. The pricing dimensions of an S3 bucket are stored data, number of requests, number of tags, and many more. EC2 instances are billed based on how long they run, how much storage you provision, and how much traffic they receive and send (some traffic is free). Keep in mind that each service is different. E.g., GBs stored, number of requests, etc. A pricing model consists of one or many pricing dimensions. To get accurate numbers, you have to understand the pricing model of the used AWS services. Calculating AWS costs upfront is a challenge.
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