Click to sum age in all rows') .prependTo( '#demo' ) .on( 'click', function () { alert( 'Column sum is: '+ table.column( 3 ).data().sum() ); } ); $('Click to sum age of visible rows') .prependTo( '#demo' ) .on( 'click', function () { alert( 'Column sum is: '+ table.column( 3, {page:'current'} ).data().sum() ); } ); } ); ]]>