diff --git a/CHANGES.rst b/CHANGES.rst
index 462bd2746c..bbb913790d 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -33,6 +33,7 @@ Changelog
 
 **Fixed**
 
+- #1452 Fix missing error percentage calculation for reference samples
 - #1447 New Client contact has access to last client's Sample only
 - #1446 Parameter `group` in `contact._addUserToGroup` was not considered
 - #1444 Fixed Worksheet autofill of wide Iterims
diff --git a/bika/lims/browser/referencesample.py b/bika/lims/browser/referencesample.py
index b2a4cfb4b0..e217b3df74 100644
--- a/bika/lims/browser/referencesample.py
+++ b/bika/lims/browser/referencesample.py
@@ -348,6 +348,7 @@ def folderitem(self, obj, item, index):
         item["result"] = ref_result.get("result")
         item["min"] = ref_result.get("min")
         item["max"] = ref_result.get("max")
+        item["error"] = ref_result.get("error")
 
         # Icons
         after_icons = ""
diff --git a/bika/lims/browser/widgets/referenceresultswidget.py b/bika/lims/browser/widgets/referenceresultswidget.py
index 63d614b69a..9ba7161345 100644
--- a/bika/lims/browser/widgets/referenceresultswidget.py
+++ b/bika/lims/browser/widgets/referenceresultswidget.py
@@ -47,8 +47,6 @@ def __init__(self, context, request, fieldvalue=[], allow_edit=True):
         }
         self.context_actions = {}
 
-
-        self.show_column_toggles = False
         self.show_select_column = True
         self.show_select_all_checkbox = True
         self.pagesize = 999999
@@ -162,6 +160,7 @@ def folderitem(self, obj, item, index):
         item["result"] = rr.get("result", "")
         item["min"] = rr.get("min", "")
         item["max"] = rr.get("max", "")
+        item["error"] = rr.get("error", "")
 
         # Icons
         after_icons = ""
@@ -224,16 +223,24 @@ def process_form(self, instance, field, form,
 
             # If neither min nor max have been set, assume we only accept a
             # discrete result (like if % of error was 0).
+            s_err = self._get_spec_value(form, uid, "error")
             s_min = self._get_spec_value(form, uid, "min", result)
             s_max = self._get_spec_value(form, uid, "max", result)
 
+            # If an error percentage was given, calculate the min/max from the
+            # error percentage
+            if s_err:
+                s_min = float(result) * (1 - float(s_err)/100)
+                s_max = float(result) * (1 + float(s_err)/100)
+
             service = api.get_object_by_uid(uid)
             values[uid] = {
                 "keyword": service.getKeyword(),
                 "uid": uid,
                 "result": result,
                 "min": s_min,
-                "max": s_max
+                "max": s_max,
+                "error": s_err
             }
 
         return values.values(), {}
diff --git a/bika/lims/content/analysisspec.py b/bika/lims/content/analysisspec.py
index 6029c3e8e9..790b13129f 100644
--- a/bika/lims/content/analysisspec.py
+++ b/bika/lims/content/analysisspec.py
@@ -221,6 +221,7 @@ def __init__(self, *arg, **kw):
         super(ResultsRangeDict, self).__init__(*arg, **kw)
         self["min"] = self.min
         self["max"] = self.max
+        self["error"] = self.error
         self["warn_min"] = self.warn_min
         self["warn_max"] = self.warn_max
         self["min_operator"] = self.min_operator
@@ -234,6 +235,10 @@ def min(self):
     def max(self):
         return self.get("max", '')
 
+    @property
+    def error(self):
+        return self.get("error", '')
+
     @property
     def warn_min(self):
         return self.get("warn_min", self.min)