diff --git a/src/calibre/ebooks/docx/writer/styles.py b/src/calibre/ebooks/docx/writer/styles.py
index f1647ad4e4..d2c7455a17 100644
--- a/src/calibre/ebooks/docx/writer/styles.py
+++ b/src/calibre/ebooks/docx/writer/styles.py
@@ -220,7 +220,7 @@ class TextStyle(DOCXStyle):
             self.spacing = None
         va = css.first_vertical_align
         if isinstance(va, (int, float)):
-            self.vertical_align = str(int(self.vertical_align * 2))
+            self.vertical_align = str(int(va * 2))
         else:
             val = {
                 'top':'superscript', 'text-top':'superscript', 'sup':'superscript', 'super':'superscript',
diff --git a/src/calibre/ebooks/oeb/stylizer.py b/src/calibre/ebooks/oeb/stylizer.py
index 31bef3089b..43e1434fe3 100644
--- a/src/calibre/ebooks/oeb/stylizer.py
+++ b/src/calibre/ebooks/oeb/stylizer.py
@@ -701,6 +701,9 @@ class Style(object):
         approximation of considering the first non-default vertical-align '''
         val = self['vertical-align']
         if val != 'baseline':
+            raw_val = self._get('vertical-align')
+            if '%' in raw_val:
+                val = self._unit_convert(raw_val, base=self['line-height'])
             return val
         parent = self._get_parent()
         if parent is not None and 'inline' in parent['display']: