Here is some links about Calculated column in sharepoint list.
(1) SharePoint - get value of calculated field without manual parsing
(2) About SharePoint Calculated Columns
(3) SharePoint calculated column and jQuery Highlight row
(4) Controlling the Result Type for Calculate Fields
(5) SharePoint List Calculated Column - Calculate Business Days
(6) Calculated Field Formulas
(7) Examlples of common furmulas - Windows Sharepoint Service - Office.com
(8) Programmatically setting field value for sharepoint listitem
(9) SharePoint Calculated Columns Formulas
(10) Adding Calculated Field in SharePoint List Programmatically
(11) WSS Practice: Create a list, columns and view programmatically
Links to calculate field value
(1) Aging Calculated Fields in SharePoint
(2) Common Date Time formulas for Sharepoint – Calculated Fields « Abstract Spaces
(3) How to calculate age of list items in SharePoint
(4) Using [Today] in SharePoint calculated default values
(5) SharePoint Calculated columns – Adding hours onto a date field
(6) Gantt charts Start/End date on calculated columns
(7) The Truth about using [Today] in SharePoint Calculated Columns
(8) Working Days, Weekdays and Holidays in SharePoint Calculated Columns
(9) SharePoint Calculated Column Cheat Sheet
(10) How to use [Today] in a SharePoint list
(11) Advanced SharePoint View and Filter techniques
(1) SharePoint - get value of calculated field without manual parsing
(2) About SharePoint Calculated Columns
(3) SharePoint calculated column and jQuery Highlight row
(4) Controlling the Result Type for Calculate Fields
(5) SharePoint List Calculated Column - Calculate Business Days
(6) Calculated Field Formulas
(7) Examlples of common furmulas - Windows Sharepoint Service - Office.com
(8) Programmatically setting field value for sharepoint listitem
(9) SharePoint Calculated Columns Formulas
(10) Adding Calculated Field in SharePoint List Programmatically
(11) WSS Practice: Create a list, columns and view programmatically
Links to calculate field value
(1) Aging Calculated Fields in SharePoint
(2) Common Date Time formulas for Sharepoint – Calculated Fields « Abstract Spaces
(3) How to calculate age of list items in SharePoint
(4) Using [Today] in SharePoint calculated default values
(5) SharePoint Calculated columns – Adding hours onto a date field
(6) Gantt charts Start/End date on calculated columns
(7) The Truth about using [Today] in SharePoint Calculated Columns
(8) Working Days, Weekdays and Holidays in SharePoint Calculated Columns
(9) SharePoint Calculated Column Cheat Sheet
(10) How to use [Today] in a SharePoint list
(11) Advanced SharePoint View and Filter techniques