diff --git a/tabbycat/utils/tables.py b/tabbycat/utils/tables.py
index 9a817c8a7ab..96f0d2295f5 100644
--- a/tabbycat/utils/tables.py
+++ b/tabbycat/utils/tables.py
@@ -833,7 +833,10 @@ def add_metric_columns(self, standings, integer_score_columns=[]):
                     sort = float(metric)
                 except (TypeError, ValueError):
                     sort = 99999
-                row.append({'text': metricformat(metric), 'sort': sort})
+                cell = {'text': metricformat(metric), 'sort': sort}
+                if isinstance(metric, float):
+                    cell['tooltip'] = str(metric)
+                row.append(cell)
             data.append(row)
         self.add_columns(headers, data)