diff --git a/src/barchart/percentbarchartitem.cpp b/src/barchart/percentbarchartitem.cpp
index 7cf1154..552356a 100644
--- a/src/barchart/percentbarchartitem.cpp
+++ b/src/barchart/percentbarchartitem.cpp
@@ -47,7 +47,7 @@ QVector<QRectF> PercentBarChartItem::calculateLayout()
     qreal scaleY = (height / rangeY);
     qreal scaleX = (width / rangeX);
     qreal categoryWidth = width / categoryCount;
-    qreal barWidth = categoryWidth / setCount - categoryWidth * m_series->d_func()->barMargin();
+    qreal barWidth = categoryWidth - categoryWidth * m_series->d_func()->barMargin();
 
     int itemIndex(0);
     for (int category = 0; category < categoryCount; category++) {
diff --git a/src/barchart/qbarseries.cpp b/src/barchart/qbarseries.cpp
index 56ce1c6..9285ac0 100644
--- a/src/barchart/qbarseries.cpp
+++ b/src/barchart/qbarseries.cpp
@@ -231,7 +231,7 @@ bool QBarSeries::isLabelsVisible() const
 
 QBarSeriesPrivate::QBarSeriesPrivate(QBarSeries *q) :
     QAbstractSeriesPrivate(q),
-    m_barMargin(0.05),  // Default value is 5% of category width
+    m_barMargin(0.5),  // Default value is 50% of category width
     m_labelsVisible(false),
     m_visible(true)
 {
diff --git a/src/barchart/stackedbarchartitem.cpp b/src/barchart/stackedbarchartitem.cpp
index 604e0e8..83e547c 100644
--- a/src/barchart/stackedbarchartitem.cpp
+++ b/src/barchart/stackedbarchartitem.cpp
@@ -46,12 +46,12 @@ QVector<QRectF> StackedBarChartItem::calculateLayout()
     qreal scaleY = (height / rangeY);
     qreal scaleX = (width / rangeX);
     qreal categoryWidth = width / categoryCount;
-    qreal barWidth = categoryWidth / setCount - categoryWidth * m_series->d_func()->barMargin();
+    qreal barWidth = categoryWidth - categoryWidth * m_series->d_func()->barMargin();
 
     int itemIndex(0);
     for (int category = 0; category < categoryCount; category++) {
         qreal yPos = height + rangeY * m_domainMinY + geometry().topLeft().y();
-        for (int set=0; set < m_series->barsetCount(); set++) {
+        for (int set=0; set < setCount; set++) {
             QBarSet* barSet = m_series->d_func()->barsetAt(set);
 
             qreal xPos = (barSet->at(category).x() - m_domainMinX) * scaleX + m_rect.left() - barWidth/2;