Whenever you design your software architecture based on AWS, you may need to know how must cost it will consume while serving your service - following service will help you to get your estimated cost.
|AWS Simple Monthly Calculator||https://calculator.s3.amazonaws.com/index.html|
Super simple and easy to use if you are familiar with AWS compontents. You can simply select region, compute instances, storage, expected run time, IP and etc.
|AWS Pricing Calculator||https://calculator.aws/#/|
Calculator based on wizard for those who does not familiar with AWS components, but sometimes easy to select unnecessary components by its fantastic temptation.
Personally I prefer to use AWS Simple Monthly Calculator, but you may able to select your desired solution based on your need.