diff --git a/src/Rasterization/Renderers/SVGEllipseRenderer.php b/src/Rasterization/Renderers/SVGEllipseRenderer.php
index c4ebff0..393c5ff 100644
--- a/src/Rasterization/Renderers/SVGEllipseRenderer.php
+++ b/src/Rasterization/Renderers/SVGEllipseRenderer.php
@@ -18,10 +18,10 @@ class SVGEllipseRenderer extends SVGRenderer
     protected function prepareRenderParams(SVGRasterizer $rasterizer, array $options)
     {
         return array(
-            'cx'        => $options['cx'] * $rasterizer->getScaleX(),
-            'cy'        => $options['cy'] * $rasterizer->getScaleY(),
-            'width'     => $options['rx'] * 2 * $rasterizer->getScaleX(),
-            'height'    => $options['ry'] * 2 * $rasterizer->getScaleY(),
+            'cx'        => self::prepareLengthX($options['cx'], $rasterizer),
+            'cy'        => self::prepareLengthY($options['cy'], $rasterizer),
+            'width'     => self::prepareLengthX($options['rx'], $rasterizer) * 2,
+            'height'    => self::prepareLengthY($options['ry'], $rasterizer) * 2,
         );
     }
 
diff --git a/src/Rasterization/Renderers/SVGLineRenderer.php b/src/Rasterization/Renderers/SVGLineRenderer.php
index b3b7ad5..e75dc62 100644
--- a/src/Rasterization/Renderers/SVGLineRenderer.php
+++ b/src/Rasterization/Renderers/SVGLineRenderer.php
@@ -18,10 +18,10 @@ class SVGLineRenderer extends SVGRenderer
     protected function prepareRenderParams(SVGRasterizer $rasterizer, array $options)
     {
         return array(
-            'x1' => $options['x1'] * $rasterizer->getScaleX(),
-            'y1' => $options['y1'] * $rasterizer->getScaleY(),
-            'x2' => $options['x2'] * $rasterizer->getScaleX(),
-            'y2' => $options['y2'] * $rasterizer->getScaleY(),
+            'x1' => self::prepareLengthX($options['x1'], $rasterizer),
+            'y1' => self::prepareLengthY($options['y1'], $rasterizer),
+            'x2' => self::prepareLengthX($options['x2'], $rasterizer),
+            'y2' => self::prepareLengthY($options['y2'], $rasterizer),
         );
     }
 
diff --git a/src/Rasterization/Renderers/SVGRectRenderer.php b/src/Rasterization/Renderers/SVGRectRenderer.php
index 17d1d06..e1b3f71 100644
--- a/src/Rasterization/Renderers/SVGRectRenderer.php
+++ b/src/Rasterization/Renderers/SVGRectRenderer.php
@@ -17,10 +17,10 @@ class SVGRectRenderer extends SVGRenderer
 {
     protected function prepareRenderParams(SVGRasterizer $rasterizer, array $options)
     {
-        $x1 = $options['x'] * $rasterizer->getScaleX();
-        $y1 = $options['y'] * $rasterizer->getScaleY();
-        $w  = $options['width'] * $rasterizer->getScaleX();
-        $h  = $options['height'] * $rasterizer->getScaleY();
+        $x1 = self::prepareLengthX($options['x'], $rasterizer);
+        $y1 = self::prepareLengthY($options['y'], $rasterizer);
+        $w  = self::prepareLengthX($options['width'], $rasterizer);
+        $h  = self::prepareLengthY($options['height'], $rasterizer);
 
         return array(
             'x1' => $x1,
diff --git a/src/Rasterization/Renderers/SVGRenderer.php b/src/Rasterization/Renderers/SVGRenderer.php
index cbfd212..eca53cf 100644
--- a/src/Rasterization/Renderers/SVGRenderer.php
+++ b/src/Rasterization/Renderers/SVGRenderer.php
@@ -53,7 +53,7 @@ public function render(SVGRasterizer $rasterizer, array $options, SVGNode $conte
         if (isset($stroke) && $stroke !== 'none') {
             $stroke      = self::prepareColor($stroke, $context);
             $strokeWidth = $context->getComputedStyle('stroke-width');
-            $strokeWidth = self::prepareLength($strokeWidth, $rasterizer);
+            $strokeWidth = self::prepareLengthX($strokeWidth, $rasterizer);
 
             $this->renderStroke($image, $params, $stroke, $strokeWidth);
         }
@@ -128,19 +128,35 @@ private static function calculateTotalOpacity(SVGNode $node)
 
 
     /**
-     * Parses the length string and multiplies it with the rasterizer's scale.
+     * Parses the length string in relation to the rasterizer's X dimension.
      *
-     * @param string        $len        The CSS length string.
-     * @param SVGRasterizer $rasterizer The rasterizer for scaling the length.
+     * @param string        $len The CSS length string.
+     * @param SVGRasterizer $ras The rasterizer for scaling the length.
      *
      * @return float The parsed and scaled length, in pixels.
      */
-    private static function prepareLength($len, SVGRasterizer $rasterizer)
+    protected static function prepareLengthX($len, SVGRasterizer $ras)
     {
-        $docWidth = $rasterizer->getDocumentWidth();
-        $scaleX   = $rasterizer->getScaleX();
+        $doc   = $ras->getDocumentWidth();
+        $scale = $ras->getScaleX();
 
-        return SVG::convertUnit($len, $docWidth) * $scaleX;
+        return SVG::convertUnit($len, $doc) * $scale;
+    }
+
+    /**
+     * Parses the length string in relation to the rasterizer's Y dimension.
+     *
+     * @param string        $len The CSS length string.
+     * @param SVGRasterizer $ras The rasterizer for scaling the length.
+     *
+     * @return float The parsed and scaled length, in pixels.
+     */
+    protected static function prepareLengthY($len, SVGRasterizer $ras)
+    {
+        $doc   = $ras->getDocumentWidth();
+        $scale = $ras->getScaleY();
+
+        return SVG::convertUnit($len, $doc) * $scale;
     }
 
 
diff --git a/src/SVG.php b/src/SVG.php
index e0417ff..33e226a 100644
--- a/src/SVG.php
+++ b/src/SVG.php
@@ -36,7 +36,7 @@ public static function convertUnit($unit, $viewLength)
         }
 
         $num  = floatval($matches[1]);
-        $unit = $matches[2];
+        $unit = isset($matches[2]) ? $matches[2] : null;
 
         if ($unit === 'px' || $unit === null) {
             return $num;