To effectively estimate the costs of using GCP services, Google offers several tools. The Pricing Calculator allows for a straightforward estimation of your GCP usage by detailing services like Compute Engine instances and persistent disks. Additionally, the TCO Tool helps in assessing the total cost of ownership for migrating to GCP. These tools are invaluable for planning and budgeting your cloud infrastructure. For more details, visit Google Cloud Pricing Calculator and TCO Assessment Tool.