diff --git a/processing/post/addCalculation.py b/processing/post/addCalculation.py
new file mode 100755
index 000000000..7f26b64bf
--- /dev/null
+++ b/processing/post/addCalculation.py
@@ -0,0 +1,112 @@
+#!/usr/bin/python
+
+import os,re,sys,math,string,damask_tools
+from optparse import OptionParser, Option
+
+# -----------------------------
+class extendableOption(Option):
+# -----------------------------
+# used for definition of new option parser action 'extend', which enables to take multiple option arguments
+# taken from online tutorial http://docs.python.org/library/optparse.html
+  
+  ACTIONS = Option.ACTIONS + ("extend",)
+  STORE_ACTIONS = Option.STORE_ACTIONS + ("extend",)
+  TYPED_ACTIONS = Option.TYPED_ACTIONS + ("extend",)
+  ALWAYS_TYPED_ACTIONS = Option.ALWAYS_TYPED_ACTIONS + ("extend",)
+
+  def take_action(self, action, dest, opt, value, values, parser):
+    if action == "extend":
+      lvalue = value.split(",")
+      values.ensure_value(dest, []).extend(lvalue)
+    else:
+      Option.take_action(self, action, dest, opt, value, values, parser)
+
+
+
+def L2(object):
+
+  return math.sqrt(sum([x*x for x in object]))
+
+
+# --------------------------------------------------------------------
+#                                MAIN
+# --------------------------------------------------------------------
+
+parser = OptionParser(option_class=extendableOption, usage='%prog options [file[s]]', description = """
+Add column(s) containing norm of requested column(s) being either vectors or tensors.
+
+""" + string.replace('$Id: addNorm.py 1118 2011-11-23 14:54:53Z MPIE\p.eisenlohr $','\n','\\n')
+)
+
+
+parser.add_option('-l','--label',   dest='labels', action='extend', type='string', \
+                                    help='(list of) new column labels')
+parser.add_option('-f','--formula', dest='formulas', action='extend', type='string', \
+                                    help='(list of) formulas corresponding to labels')
+
+parser.set_defaults(labels= [])
+parser.set_defaults(formulas= [])
+
+(options,filenames) = parser.parse_args()
+
+if len(options.labels) != len(options.formulas):
+  parser.error('number of labels (%i) and formulas (%i) do not match'%(len(options.labels),len(options.formulas)))
+
+# ------------------------------------------ setup file handles ---------------------------------------  
+
+files = []
+if filenames == []:
+  files.append({'name':'STDIN', 'input':sys.stdin, 'output':sys.stdout})
+else:
+  for name in filenames:
+    if os.path.exists(name):
+      files.append({'name':name, 'input':open(name), 'output':open(name+'_tmp','w')})
+
+# ------------------------------------------ loop over input files ---------------------------------------  
+
+for file in files:
+  if file['name'] != 'STDIN': print file['name']
+
+  table = damask_tools.ASCII_TABLE(file['input'],file['output'],False)      # make unbuffered ASCII_table
+  table.head_read()                                                         # read ASCII header info
+  table.info_append(string.replace('$Id: addNorm.py 1118 2011-11-23 14:54:53Z MPIE\p.eisenlohr $','\n','\\n') + \
+                    '\t' + ' '.join(sys.argv[1:]))
+
+  column = {}
+  evaluator = {}
+  for label,formula in zip(options.labels,options.formulas):
+    table.labels_append(label)
+    interpolator = []
+    operands = re.findall(r'\$(.+?)\$',formula)
+    for operand in operands:
+      if not operand in column:
+        try:
+          column[operand] = table.labels.index(operand)
+        except:
+          parser.error('column %s not found...\n'%operand)
+        interpolator += ['float(table.data[%i])'%column[operand]]
+    for operand in operands:
+      formula = formula.replace('$'+operand+'$','%e')
+    evaluator[label] = "'" + formula + "'%(" + ','.join(interpolator) + ")" 
+
+# ------------------------------------------ assemble header ---------------------------------------  
+
+  table.head_write()
+
+# ------------------------------------------ process data ---------------------------------------  
+
+  while table.data_read():                                                  # read next data line of ASCII table
+  
+    for label in options.labels:
+      table.data_append(eval(eval(evaluator[label])))
+
+    table.data_write()                                                      # output processed line
+
+# ------------------------------------------ output result ---------------------------------------  
+
+  table.output_flush()                                                      # just in case of buffered ASCII table
+
+  file['input'].close()                                                     # close input ASCII table
+  if file['name'] != 'STDIN':
+    file['output'].close                                                    # close output ASCII table
+    os.rename(file['name']+'_tmp',file['name'])                             # overwrite old one with tmp new
diff --git a/processing/setup/setup_processing.py b/processing/setup/setup_processing.py
index bf1e1177b..293fe2133 100755
--- a/processing/setup/setup_processing.py
+++ b/processing/setup/setup_processing.py
@@ -22,6 +22,7 @@ bin_link = { \
         'post' : [
                 '3Dvisualize.py',
                 'addCauchy.py',
+                'addCalculation.py',
                 'addDeterminant.py',
                 'addDivergence.py',
                 'addMises.py',