diff --git a/src/common/QskIntervalF.cpp b/src/common/QskIntervalF.cpp
index 7be71c8b..e94f7769 100644
--- a/src/common/QskIntervalF.cpp
+++ b/src/common/QskIntervalF.cpp
@@ -7,6 +7,7 @@
 #include "QskFunctions.h"
 
 #include <qvariant.h>
+#include <qrect.h>
 #include <algorithm>
 
 static void qskRegisterIntervalF()
@@ -226,6 +227,13 @@ bool QskIntervalF::fuzzyIsBoundary( qreal value ) const
         || qskFuzzyCompare( value, m_upperBound );
 }
 
+QRectF QskIntervalF::toRect( const QskIntervalF& intervalX,
+    const QskIntervalF& intervalY ) noexcept
+{
+    return QRectF( intervalX.lowerBound(), intervalY.lowerBound(),
+        intervalX.width(), intervalY.width() ).normalized();
+}
+
 #ifndef QT_NO_DEBUG_STREAM
 
 #include <qdebug.h>
diff --git a/src/common/QskIntervalF.h b/src/common/QskIntervalF.h
index 0119299a..7c44b0ea 100644
--- a/src/common/QskIntervalF.h
+++ b/src/common/QskIntervalF.h
@@ -11,6 +11,7 @@
 #include <qmetatype.h>
 
 class QVariant;
+class QRectF;
 
 class QSK_EXPORT QskIntervalF
 {
@@ -82,6 +83,8 @@ class QSK_EXPORT QskIntervalF
 
     QskIntervalF interpolated( const QskIntervalF&, qreal progress ) const noexcept;
 
+    static QRectF toRect( const QskIntervalF&, const QskIntervalF& ) noexcept;
+
     static QVariant interpolate( const QskIntervalF&,
         const QskIntervalF&, qreal progress ) noexcept;