diff --git a/demos/chartviewer/charts/domain/linelogxlogy.cpp b/demos/chartviewer/charts/domain/linelogxlogy.cpp
index 12b817a..3180baf 100644
--- a/demos/chartviewer/charts/domain/linelogxlogy.cpp
+++ b/demos/chartviewer/charts/domain/linelogxlogy.cpp
@@ -47,7 +47,7 @@ public:
         }
 
         QLogValueAxis *axisX= new QLogValueAxis();
-        axisX->setBase(1.2);
+        axisX->setBase(2);
         QLogValueAxis *axisY= new QLogValueAxis();
         axisY->setBase(2);
         foreach (QAbstractSeries *series, chart->series()) {
diff --git a/src/axis/logvalueaxis/qlogvalueaxis.cpp b/src/axis/logvalueaxis/qlogvalueaxis.cpp
index 9b1fa25..62fb54d 100644
--- a/src/axis/logvalueaxis/qlogvalueaxis.cpp
+++ b/src/axis/logvalueaxis/qlogvalueaxis.cpp
@@ -180,11 +180,14 @@ QString QLogValueAxis::labelFormat() const
 void QLogValueAxis::setBase(qreal base)
 {
     // check if base is correct
-    if (base <= 0 || qFuzzyCompare(base, 1))
+    if (qFuzzyCompare(base, 1))
         return;
 
-    Q_D(QLogValueAxis);
-    d->m_base = base;
+    if (base > 0) {
+        Q_D(QLogValueAxis);
+        d->m_base = base;
+        emit d->baseChanged(base);
+    }
 }
 
 qreal QLogValueAxis::base() const
diff --git a/src/axis/logvalueaxis/qlogvalueaxis_p.h b/src/axis/logvalueaxis/qlogvalueaxis_p.h
index 5d6d782..85bb16a 100644
--- a/src/axis/logvalueaxis/qlogvalueaxis_p.h
+++ b/src/axis/logvalueaxis/qlogvalueaxis_p.h
@@ -56,6 +56,9 @@ class QLogValueAxisPrivate : public QAbstractAxisPrivate
     void setRange(const QVariant &min, const QVariant &max);
     int tickCount() const;
 
+    Q_SIGNALS:
+    void baseChanged(qreal base);
+
     protected:
     qreal m_min;
     qreal m_max;
diff --git a/src/domain/logxlogydomain.cpp b/src/domain/logxlogydomain.cpp
index 7d46c44..ed117c4 100644
--- a/src/domain/logxlogydomain.cpp
+++ b/src/domain/logxlogydomain.cpp
@@ -143,10 +143,12 @@ QVector<QPointF> LogXLogYDomain::calculateGeometryPoints(const QList<QPointF>& v
 
 QPointF LogXLogYDomain::calculateDomainPoint(const QPointF &point) const
 {
-    const qreal deltaX = m_size.width() / (m_maxX - m_minX);
-    const qreal deltaY = m_size.height() / (m_maxY - m_minY);
-    qreal x = point.x() / deltaX + m_minX;
-    qreal y = (point.y() - m_size.height()) / (-deltaY) + m_minY;
+    const qreal leftEdgeX= m_logMinX < m_logMaxX ? m_logMinX : m_logMaxX;
+    const qreal leftEdgeY = m_logMinY < m_logMaxY ? m_logMinY : m_logMaxY;
+    const qreal deltaX = m_size.width() / qAbs(m_logMaxX - m_logMinX);
+    const qreal deltaY = m_size.height() / qAbs(m_logMaxY - m_logMinY);
+    qreal x = qPow(m_logBaseX, leftEdgeX + point.x() / deltaX);
+    qreal y = qPow(m_logBaseY, leftEdgeY + (m_size.height() - point.y()) / deltaY);
     return QPointF(x, y);
 }
 
diff --git a/src/domain/logxydomain.cpp b/src/domain/logxydomain.cpp
index 31e6760..c15c495 100644
--- a/src/domain/logxydomain.cpp
+++ b/src/domain/logxydomain.cpp
@@ -145,9 +145,10 @@ QVector<QPointF> LogXYDomain::calculateGeometryPoints(const QList<QPointF>& vect
 
 QPointF LogXYDomain::calculateDomainPoint(const QPointF &point) const
 {
-    const qreal deltaX = m_size.width() / (m_maxX - m_minX);
+    const qreal leftEdgeX= m_logMinX < m_logMaxX ? m_logMinX : m_logMaxX;
+    const qreal deltaX = m_size.width() / qAbs(m_logMaxX - m_logMinX);
     const qreal deltaY = m_size.height() / (m_maxY - m_minY);
-    qreal x = point.x() / deltaX + m_minX;
+    qreal x = qPow(m_logBaseX, leftEdgeX + point.x() / deltaX);
     qreal y = (point.y() - m_size.height()) / (-deltaY) + m_minY;
     return QPointF(x, y);
 }
diff --git a/src/domain/xlogydomain.cpp b/src/domain/xlogydomain.cpp
index fb2f9ee..6b79123 100644
--- a/src/domain/xlogydomain.cpp
+++ b/src/domain/xlogydomain.cpp
@@ -146,9 +146,10 @@ QVector<QPointF> XLogYDomain::calculateGeometryPoints(const QList<QPointF>& vect
 QPointF XLogYDomain::calculateDomainPoint(const QPointF &point) const
 {
     const qreal deltaX = m_size.width() / (m_maxX - m_minX);
-    const qreal deltaY = m_size.height() / (m_maxY - m_minY);
+    const qreal leftEdgeY = m_logMinY < m_logMaxY ? m_logMinY : m_logMaxY;
+    const qreal deltaY = m_size.height() / qAbs(m_logMaxY - m_logMinY);
     qreal x = point.x() / deltaX + m_minX;
-    qreal y = (point.y() - m_size.height()) / (-deltaY) + m_minY;
+    qreal y = qPow(m_logBaseY, leftEdgeY + (m_size.height() - point.y()) / deltaY);
     return QPointF(x, y);
 }