diff --git a/ApplicationCode/ProjectDataModel/Rim3dOverlayInfoConfig.cpp b/ApplicationCode/ProjectDataModel/Rim3dOverlayInfoConfig.cpp
index cd99f7713b..5b27e78160 100644
--- a/ApplicationCode/ProjectDataModel/Rim3dOverlayInfoConfig.cpp
+++ b/ApplicationCode/ProjectDataModel/Rim3dOverlayInfoConfig.cpp
@@ -99,7 +99,7 @@ void Rim3dOverlayInfoConfig::update3DInfo()
 
         QString infoText = QString(
             "<p><b><center>-- %1 --</center></b><p>  "
-            "<b>Cell count:</b> Total: %2 Active: %3 <br>" 
+            "<b>Cell count. Total:</b> %2 <b>Active:</b> %3 <br>" 
             "<b>Main Grid I,J,K:</b> %4, %5, %6 <br>").arg(caseName, totCellCount, activeCellCount, iSize, jSize, kSize);
 
         if (m_reservoirView->animationMode() && m_reservoirView->cellResult()->hasResult())
@@ -108,11 +108,14 @@ void Rim3dOverlayInfoConfig::update3DInfo()
 
             double min, max;
             double p10, p90;
+            double mean;
             size_t scalarIndex = m_reservoirView->cellResult()->gridScalarIndex();
             m_reservoirView->gridCellResults()->minMaxCellScalarValues(scalarIndex, min, max);
             m_reservoirView->gridCellResults()->p10p90CellScalarValues(scalarIndex, p10, p90);
+            m_reservoirView->gridCellResults()->meanCellScalarValues(scalarIndex, mean);
 
-            infoText += QString("<blockquote> Min: %1 P10: %2 P90: %3 Max: %4 </blockquote>").arg(min).arg(p10).arg(p90).arg(max);
+            infoText += QString("<blockquote><b>Min:</b> %1   <b>P10:</b> %2   <b>Mean:</b> %3   <b>P90:</b> %4   <b>Max:</b> %5 </blockquote>").arg(min).arg(p10).arg(mean).arg(p90).arg(max);
+            //infoText += QString("<blockquote><pre>Min: %1   P10: %2   Mean: %3 \n  P90: %4   Max: %5 </pre></blockquote>").arg(min).arg(p10).arg(mean).arg(p90).arg(max);
         }
 
 
@@ -142,13 +145,16 @@ void Rim3dOverlayInfoConfig::update3DInfo()
         {
             double min, max;
             double p10, p90;
+            double mean;
+
             size_t scalarIndex = m_reservoirView->cellResult()->gridScalarIndex();
             m_reservoirView->gridCellResults()->minMaxCellScalarValues(scalarIndex, min, max);
             m_reservoirView->gridCellResults()->p10p90CellScalarValues(scalarIndex, p10, p90);
+            m_reservoirView->gridCellResults()->meanCellScalarValues(scalarIndex, mean);
 
             m_reservoirView->viewer()->showHistogram(true);
             m_reservoirView->viewer()->setHistogram(min, max, m_reservoirView->gridCellResults()->cellScalarValuesHistogram(scalarIndex));
-            m_reservoirView->viewer()->setHistogramPercentiles(p10, p90);
+            m_reservoirView->viewer()->setHistogramPercentiles(p10, p90, mean);
         }
     }
 }
diff --git a/ApplicationCode/ReservoirDataModel/RigReservoirCellResults.cpp b/ApplicationCode/ReservoirDataModel/RigReservoirCellResults.cpp
index c82a69e5b4..c3bb40f89d 100644
--- a/ApplicationCode/ReservoirDataModel/RigReservoirCellResults.cpp
+++ b/ApplicationCode/ReservoirDataModel/RigReservoirCellResults.cpp
@@ -172,6 +172,42 @@ void RigReservoirCellResults::p10p90CellScalarValues(size_t scalarResultIndex, d
     p90 = m_p10p90[scalarResultIndex].second;
 }
 
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void RigReservoirCellResults::meanCellScalarValues(size_t scalarResultIndex, double& meanValue)
+{
+    CVF_ASSERT(scalarResultIndex < resultCount());
+
+    // Extend array and cache vars
+
+    if (scalarResultIndex >= m_meanValues.size() )
+    {
+        m_meanValues.resize(scalarResultIndex+1, HUGE_VAL);
+    }
+
+    if (m_meanValues[scalarResultIndex] != HUGE_VAL)
+    {
+        meanValue = m_meanValues[scalarResultIndex];
+        return;
+    }
+
+    double valueSum = 0.0;
+    size_t count = 0;
+    for (size_t tIdx = 0; tIdx < timeStepCount(scalarResultIndex); tIdx++)
+    {
+        std::vector<double>& values = m_cellScalarResults[scalarResultIndex][tIdx];
+        for (size_t cIdx = 0; cIdx < values.size(); ++cIdx)
+        {
+            valueSum += values[cIdx];
+        }
+        count += values.size();
+    }
+
+    m_meanValues[scalarResultIndex] = valueSum/count;
+    meanValue = m_meanValues[scalarResultIndex];
+}
+
 //--------------------------------------------------------------------------------------------------
 /// 
 //--------------------------------------------------------------------------------------------------
diff --git a/ApplicationCode/ReservoirDataModel/RigReservoirCellResults.h b/ApplicationCode/ReservoirDataModel/RigReservoirCellResults.h
index 5101f4f417..38e7076d08 100644
--- a/ApplicationCode/ReservoirDataModel/RigReservoirCellResults.h
+++ b/ApplicationCode/ReservoirDataModel/RigReservoirCellResults.h
@@ -42,6 +42,7 @@ public:
     void                minMaxCellScalarValues(size_t scalarResultIndex, size_t timeStepIndex, double& min, double& max);
     const std::vector<size_t>& cellScalarValuesHistogram(size_t scalarResultIndex);
     void                p10p90CellScalarValues(size_t scalarResultIndex, double& p10, double& p90);
+    void                meanCellScalarValues(size_t scalarResultIndex, double& meanValue);
 
     // Access meta-information about the results
     size_t              resultCount() const;
@@ -76,6 +77,7 @@ private:
     std::vector< std::pair<double, double> >                m_maxMinValues; ///< Max min values for each Result index
     std::vector< std::vector<size_t> >                      m_histograms; ///< Histogram for each Result Index
     std::vector< std::pair<double, double> >                m_p10p90; ///< P10 and p90 values for each Result Index
+    std::vector< double >                                   m_meanValues; ///< Mean value for each Result Index
 
     std::vector< std::vector< std::pair<double, double> > > m_maxMinValuesPrTs; ///< Max min values for each timestep and Result index
 
diff --git a/ApplicationCode/UserInterface/RIViewer.cpp b/ApplicationCode/UserInterface/RIViewer.cpp
index b24054efd0..7a69ce87a1 100644
--- a/ApplicationCode/UserInterface/RIViewer.cpp
+++ b/ApplicationCode/UserInterface/RIViewer.cpp
@@ -481,9 +481,10 @@ void RIViewer::setHistogram(double min, double max, const std::vector<size_t>& h
 //--------------------------------------------------------------------------------------------------
 /// 
 //--------------------------------------------------------------------------------------------------
-void RIViewer::setHistogramPercentiles(double pmin, double pmax)
+void RIViewer::setHistogramPercentiles(double pmin, double pmax, double mean)
 {
     m_histogramWidget->setPercentiles(pmin, pmax);
+    m_histogramWidget->setMean(mean);
 }
 
 //--------------------------------------------------------------------------------------------------
diff --git a/ApplicationCode/UserInterface/RIViewer.h b/ApplicationCode/UserInterface/RIViewer.h
index f3551332c1..6b11bbe430 100644
--- a/ApplicationCode/UserInterface/RIViewer.h
+++ b/ApplicationCode/UserInterface/RIViewer.h
@@ -60,7 +60,7 @@ public:
     void            setInfoText(QString text);
     void            showHistogram(bool enable);
     void            setHistogram(double min, double max, const std::vector<size_t>& histogram);
-    void            setHistogramPercentiles(double pmin, double pmax);
+    void            setHistogramPercentiles(double pmin, double pmax, double mean);
 
     void            showAnimationProgress(bool enable);
  
diff --git a/ApplicationCode/UserInterface/RiuSimpleHistogramWidget.cpp b/ApplicationCode/UserInterface/RiuSimpleHistogramWidget.cpp
index 2495f94ab4..f5384166de 100644
--- a/ApplicationCode/UserInterface/RiuSimpleHistogramWidget.cpp
+++ b/ApplicationCode/UserInterface/RiuSimpleHistogramWidget.cpp
@@ -10,6 +10,8 @@ QWidget(parent, f)
 {
     m_minPercentile = HUGE_VAL;
     m_maxPercentile = HUGE_VAL;
+    m_mean = HUGE_VAL;
+
 }
 
 //--------------------------------------------------------------------------------------------------
@@ -78,6 +80,14 @@ void RiuSimpleHistogramWidget::draw(QPainter *painter,int x, int y, int width, i
         painter->setPen(QColor(255, 0, 0, 200));
         painter->drawLine(xpos, y+1, xpos, y + height -1);
     }
+
+    // Vertical lines for percentiles
+    if (m_mean != HUGE_VAL)
+    {
+        int xpos = xPosFromDomainValue(m_mean);
+        painter->setPen(QColor(0, 0, 255, 200));
+        painter->drawLine(xpos, y+1, xpos, y + height -1);
+    }
 }
 
 //--------------------------------------------------------------------------------------------------
diff --git a/ApplicationCode/UserInterface/RiuSimpleHistogramWidget.h b/ApplicationCode/UserInterface/RiuSimpleHistogramWidget.h
index d3b0e1b24b..5ced51fa8e 100644
--- a/ApplicationCode/UserInterface/RiuSimpleHistogramWidget.h
+++ b/ApplicationCode/UserInterface/RiuSimpleHistogramWidget.h
@@ -11,6 +11,7 @@ public:
 
     void                setHistogramData(double min, double max, const std::vector<size_t>& histogram);
     void                setPercentiles(double pmin, double pmax) {m_minPercentile = pmin; m_maxPercentile = pmax;}
+    void                setMean(double mean) {m_mean = mean;}
 
 protected:
      virtual void       paintEvent(QPaintEvent* event);
@@ -28,6 +29,7 @@ private:
     double              m_min;
     double              m_minPercentile;
     double              m_maxPercentile;
+    double              m_mean;
     size_t              m_maxHistogramCount;
 
     double              m_width;