To get auto increment index value to the next pages.

([Page Index] * [Page Size] + [row Index + 1])

Table's td cell loop source code

<ng-container matColumnDef="id"&gt
 <th mat-header-cell *matHeaderCellDef mat-sort-header> No.</th>
 <td mat-cell *matCellDef="let item; let i = index">
    {{ (paginatorRef.pageIndex * paginatorRef.pageSize) + (i + 1) }}