Compute nodes plus managed storage for a Redshift data warehouse.
A provisioned Redshift cluster charges for every hour it exists, busy or not. Right-size the node count, pause off-hours, and compare with other warehouses on the BigQuery cost calculator and Snowflake credit calculator.
Free Amazon Redshift cost calculator — node count, hourly node price and storage to your real monthly warehouse bill.
RA3 nodes bill per node-hour for compute, with managed storage charged separately per GB-month (about $0.024). Older DC2 nodes bundle storage into the node price. Redshift Serverless instead bills per RPU-second of actual query time.
If the cluster only runs queries part of the day, a provisioned cluster still bills every idle hour. Pausing it off-hours, or switching to Serverless so you only pay while queries run, is often much cheaper for spiky workloads.