# What do I get for one GB?

One GB represents one billion bytes of billable usage. For most Robots that transform files, we add the input and output file sizes. Processing an 800 MB input into a 200 MB output therefore uses 1 GB.

Because file sizes and workflows differ, one GB is not a fixed number of files or operations. It could cover one large conversion or many small ones. Use the [usage estimator](/pricing/)for a practical workflow estimate, and see the [Robot pricing page](/docs/robots/pricing.md) for the exact usage rules of each Robot.