DBCC CheckDB space requirements? Ran into the following error...

K:\Microsoft SQL
Server\Data\MyAudit3_Dat.NDF_MSSQL_DBCC50: Operating system error
112(There is not enough space on the disk.) encountered.

In this case the disk space was very low which needed remediation... However, it lead me to ponder
what are the disk space requirements for dbcc checkdb?
It depends on the database size.
You can run
dbcc checkdb ('master') WITH ESTIMATEONLY

To get an estimation of the space requirement. Usually, this is not really accurate but I guess it's better then nothing.