Estimate the Size of a Table

You can use the following steps to estimate the amount of space required to store data in a table:

Calculate the space required for the heap or clustered index following the instructions in Estimate the Size of a Heap or Estimate the Size of a Clustered Index.
For each nonclustered index, calculate the space required for it by following the instructions in Estimate the Size of a Nonclustered Index.
Add the values calculated in steps 1 and 2.

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