Every instance type, every region, every purchase option, accurate to the cent.

EC2 on Linux, RHEL, SLES and Windows, with SQL Server Standard or Enterprise licensing included where you need it.
RDS single-AZ and Multi-AZ for PostgreSQL, MySQL and MariaDB, SQL Server, Oracle and Db2, by edition.
Every AWS region, priced on-demand or under Compute and EC2 Instance Savings Plans and Reserved Instances on one- or three-year terms, with no upfront, partial upfront or all upfront payment.
Graviton and burstable families included or excluded with one switch.
Prices come straight from the AWS price list, and the tool shows when it was last refreshed.
This is the same pricing engine CloudHound uses to cost a migration. To price a whole estate rather than one instance, drop an RVTools export on the home page.