diff --git a/src/Gui/QuantitySpinBox.cpp b/src/Gui/QuantitySpinBox.cpp
index 825d9d3fb08d..4df87365cfbd 100644
--- a/src/Gui/QuantitySpinBox.cpp
+++ b/src/Gui/QuantitySpinBox.cpp
@@ -682,6 +682,21 @@ void QuantitySpinBox::setRange(double minimum, double maximum)
     d->maximum = maximum;
 }
 
+int QuantitySpinBox::decimals() const
+{
+    Q_D(const QuantitySpinBox);
+    return d->quantity.getFormat().precision;
+}
+
+void QuantitySpinBox::setDecimals(int v)
+{
+    Q_D(QuantitySpinBox);
+    Base::QuantityFormat f = d->quantity.getFormat();
+    f.precision = v;
+    d->quantity.setFormat(f);
+    updateText(d->quantity);
+}
+
 QAbstractSpinBox::StepEnabled QuantitySpinBox::stepEnabled() const
 {
     Q_D(const QuantitySpinBox);
diff --git a/src/Gui/QuantitySpinBox.h b/src/Gui/QuantitySpinBox.h
index d57070919c3d..23714bfb99cb 100644
--- a/src/Gui/QuantitySpinBox.h
+++ b/src/Gui/QuantitySpinBox.h
@@ -91,6 +91,11 @@ class GuiExport QuantitySpinBox : public QAbstractSpinBox, public ExpressionBind
     /// Sets the value of the maximum property 
     void setMaximum(double max);
 
+    /// Gets the number of decimals
+    int decimals() const;
+    /// Sets the number of decimals
+    void setDecimals(int v);
+
     /// Gets the path of the bound property
     QString boundToName() const;
     /// Sets the path of the bound property