diff --git a/setup/translations.py b/setup/translations.py
index 29f0228914..414f27cc23 100644
--- a/setup/translations.py
+++ b/setup/translations.py
@@ -511,7 +511,7 @@ class Translations(POT):  # {{{
             locale = fmap[src]
             trans, untrans = data['translated'], data['untranslated']
             total = trans + untrans
-            stats[locale] = int(round(100 * trans / total))
+            stats[locale] = round(100 * trans / total)
 
         with TemporaryDirectory() as tdir, ZipFile(self.j(srcbase, 'locales.zip'), 'w', ZIP_STORED) as zf:
             for f in os.listdir(srcbase):
diff --git a/src/calibre/db/__init__.py b/src/calibre/db/__init__.py
index 6e20d86b98..5360706d80 100644
--- a/src/calibre/db/__init__.py
+++ b/src/calibre/db/__init__.py
@@ -38,12 +38,12 @@ def _get_next_series_num_for_list(series_indices, unwrap=True):
                 return i
         # really shouldn't get here.
     if tweaks['series_index_auto_increment'] == 'next_free':
-        for i in range(int(ceil(series_indices[0])), 10000):
+        for i in range(ceil(series_indices[0]), 10000):
             if i not in series_indices:
                 return i
         # really shouldn't get here.
     if tweaks['series_index_auto_increment'] == 'last_free':
-        for i in range(int(ceil(series_indices[-1])), 0, -1):
+        for i in range(ceil(series_indices[-1]), 0, -1):
             if i not in series_indices:
                 return i
         return series_indices[-1] + 1
diff --git a/src/calibre/db/search.py b/src/calibre/db/search.py
index d18c80baad..a6920cfa38 100644
--- a/src/calibre/db/search.py
+++ b/src/calibre/db/search.py
@@ -300,7 +300,7 @@ class NumericSearch:  # {{{
                 raise ParseException(
                         _('Non-numeric value in query: {0}').format(query))
             if dt == 'half-rating':
-                q = int(round(q * 2))
+                q = round(q * 2)
                 cast = int
 
         qfalse = query == 'false'
diff --git a/src/calibre/devices/kobo/driver.py b/src/calibre/devices/kobo/driver.py
index 90f62393ab..436f16af27 100644
--- a/src/calibre/devices/kobo/driver.py
+++ b/src/calibre/devices/kobo/driver.py
@@ -2858,7 +2858,7 @@ class KOBOTOUCH(KOBO):
             # NOTE: Unlike Qt, we round to avoid accumulating errors,
             #       as ImageOps will then floor via fit_image
             aspect_ratio = library_size[0] / library_size[1]
-            rescaled_width = int(round(kobo_size[1] * aspect_ratio))
+            rescaled_width = round(kobo_size[1] * aspect_ratio)
 
             if expand:
                 use_height = (rescaled_width >= kobo_size[0])
@@ -2868,7 +2868,7 @@ class KOBOTOUCH(KOBO):
             if use_height:
                 kobo_size = (rescaled_width, kobo_size[1])
             else:
-                kobo_size = (kobo_size[0], int(round(kobo_size[0] / aspect_ratio)))
+                kobo_size = (kobo_size[0], round(kobo_size[0] / aspect_ratio))
 
             # Did we actually want to letterbox?
             if not letterbox:
diff --git a/src/calibre/ebooks/conversion/utils.py b/src/calibre/ebooks/conversion/utils.py
index cb8605f167..6518821379 100644
--- a/src/calibre/ebooks/conversion/utils.py
+++ b/src/calibre/ebooks/conversion/utils.py
@@ -207,7 +207,7 @@ class HeuristicProcessor:
         if wordcount > 7000:
             if wordcount > 200000:
                 typical_chapters = 15000.
-            self.min_chapters = int(ceil(wordcount / typical_chapters))
+            self.min_chapters = ceil(wordcount / typical_chapters)
         self.log.debug('minimum chapters required are: '+str(self.min_chapters))
         heading = re.compile(r'<h[1-3][^>]*>', re.IGNORECASE)
         self.html_preprocess_sections = len(heading.findall(html))
diff --git a/src/calibre/ebooks/covers.py b/src/calibre/ebooks/covers.py
index b0120681f0..dcd6217bdd 100644
--- a/src/calibre/ebooks/covers.py
+++ b/src/calibre/ebooks/covers.py
@@ -184,7 +184,7 @@ class Block:
 
     @property
     def height(self):
-        return int(ceil(sum(l if isinstance(l, numbers.Number) else l.boundingRect().height() for l in self.layouts)))
+        return ceil(sum(l if isinstance(l, numbers.Number) else l.boundingRect().height() for l in self.layouts))
 
     @property
     def position(self):
diff --git a/src/calibre/ebooks/docx/to_html.py b/src/calibre/ebooks/docx/to_html.py
index 554da8ad0a..8e7eb1cd66 100644
--- a/src/calibre/ebooks/docx/to_html.py
+++ b/src/calibre/ebooks/docx/to_html.py
@@ -715,7 +715,7 @@ class Convert:
                     ans.append(text.elem)
                     ans.set('data-noteref-container', self.uuid)
             elif self.namespace.is_tag(child, 'w:tab'):
-                spaces = int(math.ceil((self.settings.default_tab_stop / 36) * 6))
+                spaces = math.ceil((self.settings.default_tab_stop / 36) * 6)
                 text.add_elem(SPAN(NBSP * spaces))
                 ans.append(text.elem)
                 ans[-1].set('class', 'tab')
diff --git a/src/calibre/ebooks/fb2/fb2ml.py b/src/calibre/ebooks/fb2/fb2ml.py
index b5bd4af51a..8a771d8810 100644
--- a/src/calibre/ebooks/fb2/fb2ml.py
+++ b/src/calibre/ebooks/fb2/fb2ml.py
@@ -430,7 +430,7 @@ class FB2MLizer:
         tag = barename(elem_tree.tag)
         # Number of blank lines above tag
         try:
-            ems = int(round((float(style.marginTop) / style.fontSize) - 1))
+            ems = round((float(style.marginTop) / style.fontSize) - 1)
             if ems < 0:
                 ems = 0
         except:
diff --git a/src/calibre/ebooks/lrf/html/convert_from.py b/src/calibre/ebooks/lrf/html/convert_from.py
index d8576b26b2..eb9dedc579 100644
--- a/src/calibre/ebooks/lrf/html/convert_from.py
+++ b/src/calibre/ebooks/lrf/html/convert_from.py
@@ -987,7 +987,7 @@ class HTMLConverter:
             line_height = (int(self.current_block.textStyle.attrs['baselineskip']) +
                             int(self.current_block.textStyle.attrs['linespace']))//10
             line_height *= self.profile.dpi/72
-            lines = int(ceil(height/line_height))
+            lines = ceil(height/line_height)
             dc = DropCaps(lines)
             dc.append(Plot(im, xsize=ceil(width*factor), ysize=ceil(height*factor)))
             self.current_para.append(dc)
@@ -1028,7 +1028,7 @@ class HTMLConverter:
         if max(width, height) <= min(pwidth, pheight)/5:
             self.current_para.append(Plot(im, xsize=ceil(width*factor),
                                           ysize=ceil(height*factor)))
-        elif height <= int(floor((2/3)*pheight)):
+        elif height <= floor((2/3)*pheight):
             pb = self.current_block
             self.end_current_para()
             self.process_alignment(tag_css)
@@ -1046,7 +1046,7 @@ class HTMLConverter:
                 self.current_page.contents[0:1] = []
             self.current_page.append(Canvas(width=pwidth,
                                             height=height))
-            left = int(floor((pwidth - width)/2))
+            left = floor((pwidth - width)/2)
             self.current_page.contents[-1].put_object(
                             ImageBlock(self.images[path], xsize=width,
                                        ysize=height, x1=width, y1=height,
@@ -1324,9 +1324,9 @@ class HTMLConverter:
                 result = unit * 0.4 * (dpi)
         if result is not None:
             if pts:
-                result = int(round(result * (720/dpi)))
+                result = round(result * (720/dpi))
             else:
-                result = int(round(result))
+                result = round(result)
         return result
 
     def text_properties(self, tag_css):
diff --git a/src/calibre/ebooks/lrf/html/table.py b/src/calibre/ebooks/lrf/html/table.py
index 1f968601ca..617196b474 100644
--- a/src/calibre/ebooks/lrf/html/table.py
+++ b/src/calibre/ebooks/lrf/html/table.py
@@ -11,7 +11,7 @@ from polyglot.builtins import native_string_type, string_or_bytes
 
 
 def ceil(num):
-    return int(math.ceil(num))
+    return math.ceil(num)
 
 
 def print_xml(elem):
diff --git a/src/calibre/ebooks/metadata/sources/identify.py b/src/calibre/ebooks/metadata/sources/identify.py
index 4d0fceb43f..5c52fa09b4 100644
--- a/src/calibre/ebooks/metadata/sources/identify.py
+++ b/src/calibre/ebooks/metadata/sources/identify.py
@@ -297,7 +297,7 @@ class ISBNMerge:
             if rating and rating > 0 and rating <= 5:
                 ratings.append(rating)
         if ratings:
-            ans.rating = int(round(sum(ratings)/len(ratings)))
+            ans.rating = round(sum(ratings)/len(ratings))
 
         # Smallest language is likely to be valid
         ans.language = self.length_merge('language', results,
diff --git a/src/calibre/ebooks/mobi/mobiml.py b/src/calibre/ebooks/mobi/mobiml.py
index 75a0962969..0e2376c147 100644
--- a/src/calibre/ebooks/mobi/mobiml.py
+++ b/src/calibre/ebooks/mobi/mobiml.py
@@ -160,8 +160,8 @@ class MobiMLizer:
             return ptsize
         embase = self.profile.fbase
         if round(ptsize) < embase:
-            return f'{int(round(ptsize))}pt'
-        return f'{int(round(ptsize/embase))}em'
+            return f'{round(ptsize)}pt'
+        return f'{round(ptsize/embase)}em'
 
     def preize_text(self, text, pre_wrap=False):
         text = str(text)
@@ -219,7 +219,7 @@ class MobiMLizer:
                 ems = self.profile.mobi_ems_per_blockquote
                 para = wrapper = etree.SubElement(parent, XHTML('blockquote'))
                 para = wrapper
-                emleft = int(round(left / self.profile.fbase)) - ems
+                emleft = round(left / self.profile.fbase) - ems
                 emleft = min((emleft, 10))
                 while emleft > ems / 2:
                     para = etree.SubElement(para, XHTML('blockquote'))
@@ -237,7 +237,7 @@ class MobiMLizer:
                     wrapper.attrib['height'] = self.mobimlize_measure(vspace)
                 para.attrib['width'] = self.mobimlize_measure(indent)
             elif tag == 'table' and vspace > 0:
-                vspace = int(round(vspace / self.profile.fbase))
+                vspace = round(vspace / self.profile.fbase)
                 while vspace > 0:
                     wrapper.addprevious(etree.Element(XHTML('br')))
                     vspace -= 1
@@ -403,13 +403,13 @@ class MobiMLizer:
             padding = asfloat(style['padding-left'])
             lspace = margin + padding
             if lspace > 0:
-                spaces = int(round((lspace * 3) / style['font-size']))
+                spaces = round((lspace * 3) / style['font-size'])
                 elem.text = ('\xa0' * spaces) + (elem.text or '')
             margin = convert_margin(style, 'margin-right')
             padding = asfloat(style['padding-right'])
             rspace = margin + padding
             if rspace > 0:
-                spaces = int(round((rspace * 3) / style['font-size']))
+                spaces = round((rspace * 3) / style['font-size'])
                 if len(elem) == 0:
                     elem.text = (elem.text or '') + ('\xa0' * spaces)
                 else:
@@ -459,8 +459,8 @@ class MobiMLizer:
                         # img sizes in units other than px
                         # See #7520 for test case
                         try:
-                            pixs = int(round(float(value) /
-                                (72/self.profile.dpi)))
+                            pixs = round(float(value) /
+                                (72/self.profile.dpi))
                         except:
                             continue
                         result = str(pixs)
@@ -503,7 +503,7 @@ class MobiMLizer:
                 istate.attrib['width'] = raww
             else:
                 prop = style['width'] / self.profile.width
-                istate.attrib['width'] = f'{int(round(prop*100))}%'
+                istate.attrib['width'] = f'{round(prop*100)}%'
         elif display == 'table':
             tag = 'table'
         elif display == 'table-row':
diff --git a/src/calibre/ebooks/oeb/polish/container.py b/src/calibre/ebooks/oeb/polish/container.py
index 823359bbe9..30a81d8b30 100644
--- a/src/calibre/ebooks/oeb/polish/container.py
+++ b/src/calibre/ebooks/oeb/polish/container.py
@@ -131,7 +131,7 @@ def href_to_name(href, root, base=None):
 
 
 def seconds_to_timestamp(duration: float) -> str:
-    seconds = int(floor(duration))
+    seconds = floor(duration)
     float_part = duration - seconds
     hours = seconds // 3600
     minutes = (seconds % 3600) // 60
diff --git a/src/calibre/ebooks/pdf/reflow.py b/src/calibre/ebooks/pdf/reflow.py
index f4a916141f..17d7bb0b3f 100644
--- a/src/calibre/ebooks/pdf/reflow.py
+++ b/src/calibre/ebooks/pdf/reflow.py
@@ -1076,7 +1076,7 @@ class Page:
                                 frag.indented = 1  # 1em
                             else:  # Assume left margin of approx = number of chars
                                 # Should check for values approx the same, as with indents
-                                frag.margin_left = int(round(((frag.left - left_min) / self.stats_margin_px)+0.5))
+                                frag.margin_left = round(((frag.left - left_min) / self.stats_margin_px)+0.5)
                         if last_frag is not None \
                           and stats.para_space > 0 \
                           and frag.bottom - last_frag.bottom > stats.para_space*SECTION_FACTOR:
diff --git a/src/calibre/ebooks/pml/pmlml.py b/src/calibre/ebooks/pml/pmlml.py
index e69a3d36b3..c11651ac5c 100644
--- a/src/calibre/ebooks/pml/pmlml.py
+++ b/src/calibre/ebooks/pml/pmlml.py
@@ -337,7 +337,7 @@ class PMLMLizer:
 
         # Soft scene breaks.
         try:
-            ems = int(round((float(style.marginTop) / style.fontSize) - 1))
+            ems = round((float(style.marginTop) / style.fontSize) - 1)
             if ems >= 1:
                 text.append('\n\\c \n\\c\n')
         except:
diff --git a/src/calibre/ebooks/txt/markdownml.py b/src/calibre/ebooks/txt/markdownml.py
index 5b117ba3cf..c710f8bda4 100644
--- a/src/calibre/ebooks/txt/markdownml.py
+++ b/src/calibre/ebooks/txt/markdownml.py
@@ -264,7 +264,7 @@ class MarkdownMLizer(OEB2HTML):
 
         # Soft scene breaks.
         if 'margin-bottom' in style.cssdict() and style['margin-bottom'] != 'auto':
-            ems = int(round((float(style.marginBottom) / style.fontSize) - 1))
+            ems = round((float(style.marginBottom) / style.fontSize) - 1)
             if ems >= 1:
                 text.append('\n\n' * ems)
 
diff --git a/src/calibre/ebooks/txt/textileml.py b/src/calibre/ebooks/txt/textileml.py
index a26ce03a69..e11e2371ab 100644
--- a/src/calibre/ebooks/txt/textileml.py
+++ b/src/calibre/ebooks/txt/textileml.py
@@ -186,7 +186,7 @@ class TextileMLizer(OEB2HTML):
         if 'margin-left' in style.cssdict() and style['margin-left'] != 'auto':
             left_margin_pts = unit_convert(style['margin-left'], style.width, style.fontSize, stylizer.profile.dpi)
         left = add(left_margin_pts, left_padding_pts)
-        emleft = min(int(round(left / stylizer.profile.fbase)), self.MAX_EM)
+        emleft = min(round(left / stylizer.profile.fbase), self.MAX_EM)
         if emleft >= 1:
             txt += '(' * emleft
         right_padding_pts = 0
@@ -196,7 +196,7 @@ class TextileMLizer(OEB2HTML):
         if 'margin-right' in style.cssdict() and style['margin-right'] != 'auto':
             right_margin_pts = unit_convert(style['margin-right'], style.width, style.fontSize, stylizer.profile.dpi)
         right = add(right_margin_pts, right_padding_pts)
-        emright = min(int(round(right / stylizer.profile.fbase)), self.MAX_EM)
+        emright = min(round(right / stylizer.profile.fbase), self.MAX_EM)
         if emright >= 1:
             txt += ')' * emright
 
@@ -492,7 +492,7 @@ class TextileMLizer(OEB2HTML):
 
         # Soft scene breaks.
         if 'margin-bottom' in style.cssdict() and style['margin-bottom'] != 'auto':
-            ems = min(int(round((float(style.marginBottom) / style.fontSize) - 1)), self.MAX_EM)
+            ems = min(round((float(style.marginBottom) / style.fontSize) - 1), self.MAX_EM)
             if ems >= 1:
                 text.append('\n\n\xa0' * ems)
 
diff --git a/src/calibre/ebooks/txt/txtml.py b/src/calibre/ebooks/txt/txtml.py
index 0258ec68f3..99b25705f4 100644
--- a/src/calibre/ebooks/txt/txtml.py
+++ b/src/calibre/ebooks/txt/txtml.py
@@ -233,7 +233,7 @@ class TXTMLizer:
             text.append('\n\n* * *\n\n')
         # Soft scene breaks.
         try:
-            ems = int(round((float(style.marginTop) / style.fontSize) - 1))
+            ems = round((float(style.marginTop) / style.fontSize) - 1)
             if ems >= 1:
                 text.append('\n' * ems)
         except:
diff --git a/src/calibre/gui2/dialogs/trim_image.py b/src/calibre/gui2/dialogs/trim_image.py
index 2c576f506e..614e94bd3b 100644
--- a/src/calibre/gui2/dialogs/trim_image.py
+++ b/src/calibre/gui2/dialogs/trim_image.py
@@ -31,7 +31,7 @@ from calibre.gui2.tweak_book.editor.canvas import Canvas
 def reduce_to_ratio(w, h, r):
     h = min(h, w / r)
     w = r * h
-    return int(round(w)), int(round(h))
+    return round(w), round(h)
 
 
 class Region(QDialog):
diff --git a/src/calibre/gui2/icon_theme.py b/src/calibre/gui2/icon_theme.py
index b9dd7d3046..70958f2f76 100644
--- a/src/calibre/gui2/icon_theme.py
+++ b/src/calibre/gui2/icon_theme.py
@@ -211,7 +211,7 @@ def default_cover_icons(cols=5):
 
 def create_cover(report=None, icons=(), cols=5, size=120, padding=16, darkbg=False):
     icons = icons or tuple(default_cover_icons(cols))
-    rows = int(math.ceil(len(icons) / cols))
+    rows = math.ceil(len(icons) / cols)
 
     def get_path_for_icon(icon: str) -> str:
         if report is not None:
diff --git a/src/calibre/gui2/library/alternate_views.py b/src/calibre/gui2/library/alternate_views.py
index 74510abfea..2e3df1df72 100644
--- a/src/calibre/gui2/library/alternate_views.py
+++ b/src/calibre/gui2/library/alternate_views.py
@@ -1395,7 +1395,7 @@ class GridView(QListView):
             # pixelDelta() is broken on linux with wheel mice
             dy = number_of_degrees.y() / 15.0
             # Scroll by approximately half a row
-            dy = int(math.ceil((dy) * b.singleStep() / 2.0))
+            dy = math.ceil((dy) * b.singleStep() / 2.0)
         else:
             dy = number_of_pixels.y()
         if abs(dy) > 0:
diff --git a/src/calibre/gui2/tag_browser/view.py b/src/calibre/gui2/tag_browser/view.py
index 332a9cc924..d35540af51 100644
--- a/src/calibre/gui2/tag_browser/view.py
+++ b/src/calibre/gui2/tag_browser/view.py
@@ -124,7 +124,7 @@ class TagDelegate(QStyledItemDelegate):  # {{{
                 width = painter.fontMetrics().boundingRect(count).width()
                 r = QRect(tr)
                 dr = 1 if widget is None else widget.devicePixelRatioF()
-                r.setRight(r.right() - 1), r.setLeft(r.right() - width - int(ceil(4 * dr)))
+                r.setRight(r.right() - 1), r.setLeft(r.right() - width - ceil(4 * dr))
                 painter.drawText(r, Qt.AlignmentFlag.AlignCenter | Qt.TextFlag.TextSingleLine, count)
                 tr.setRight(r.left() - 1)
             else:
diff --git a/src/calibre/gui2/toc/location.py b/src/calibre/gui2/toc/location.py
index 2a542d477a..ad53f2052c 100644
--- a/src/calibre/gui2/toc/location.py
+++ b/src/calibre/gui2/toc/location.py
@@ -441,7 +441,7 @@ class ItemEdit(QWidget):
         self.current_changed(item)
 
     def get_loctext(self, frac):
-        frac = int(round(frac * 100))
+        frac = round(frac * 100)
         if frac == 0:
             loctext = _('Top of the file')
         else:
diff --git a/src/calibre/gui2/tweak_book/completion/popup.py b/src/calibre/gui2/tweak_book/completion/popup.py
index be4c5de13e..1a929a777e 100644
--- a/src/calibre/gui2/tweak_book/completion/popup.py
+++ b/src/calibre/gui2/tweak_book/completion/popup.py
@@ -82,8 +82,8 @@ class ChoosePopupWidget(QWidget):
             max_width = height = 0
             for text, positions in self.current_results:
                 sz = self.get_static_text(text, positions).size()
-                height += int(ceil(sz.height())) + self.BOTTOM_MARGIN
-                max_width = max(max_width, int(ceil(sz.width())))
+                height += ceil(sz.height()) + self.BOTTOM_MARGIN
+                max_width = max(max_width, ceil(sz.width()))
             self.current_size_hint = QSize(max_width + 2 * self.SIDE_MARGIN, height + self.BOTTOM_MARGIN + self.TOP_MARGIN)
         return self.current_size_hint
 
@@ -92,7 +92,7 @@ class ChoosePopupWidget(QWidget):
         bottom = self.rect().bottom()
         for i, (text, positions) in enumerate(self.current_results[self.current_top_index:]):
             st = self.get_static_text(text, positions)
-            height = self.BOTTOM_MARGIN + int(ceil(st.size().height()))
+            height = self.BOTTOM_MARGIN + ceil(st.size().height())
             if y + height > bottom:
                 break
             yield i + self.current_top_index, st, y, height
diff --git a/src/calibre/gui2/tweak_book/diff/view.py b/src/calibre/gui2/tweak_book/diff/view.py
index 6b0b1a084c..4197098986 100644
--- a/src/calibre/gui2/tweak_book/diff/view.py
+++ b/src/calibre/gui2/tweak_book/diff/view.py
@@ -687,7 +687,7 @@ class DiffSplit(QSplitter):  # {{{
         w, h = int(img.width()/img.devicePixelRatio()), int(img.height()/img.devicePixelRatio())
         scaled, w, h = fit_image(w, h, view.available_width() - 3, int(0.9 * view.height()))
         line_height = view.blockBoundingRect(view.document().begin()).height()
-        return int(ceil(h / line_height)) + 1, w
+        return ceil(h / line_height) + 1, w
     # }}}
 
     # text diffs {{{
@@ -1062,7 +1062,7 @@ class DiffView(QWidget):  # {{{
         self.scrollbar.setSingleStep(min(ls.singleStep(), rs.singleStep()))
         self.scrollbar.setRange(0, ls.maximum() + self.delta)
         self.scrollbar.setVisible(self.view.left.document().lineCount() > ls.pageStep() or self.view.right.document().lineCount() > rs.pageStep())
-        self.syncpos = int(ceil(self.scrollbar.pageStep() * self.SYNC_POSITION))
+        self.syncpos = ceil(self.scrollbar.pageStep() * self.SYNC_POSITION)
 
     def finalize(self):
         self.view.finalize()
diff --git a/src/calibre/gui2/tweak_book/editor/widget.py b/src/calibre/gui2/tweak_book/editor/widget.py
index 0604c41095..be11370d1b 100644
--- a/src/calibre/gui2/tweak_book/editor/widget.py
+++ b/src/calibre/gui2/tweak_book/editor/widget.py
@@ -42,7 +42,7 @@ from polyglot.builtins import itervalues, string_or_bytes
 def create_icon(text, palette=None, sz=None, divider=2, fill='white'):
     if isinstance(fill, string_or_bytes):
         fill = QColor(fill)
-    sz = sz or int(math.ceil(tprefs['toolbar_icon_size'] * QApplication.instance().devicePixelRatio()))
+    sz = sz or math.ceil(tprefs['toolbar_icon_size'] * QApplication.instance().devicePixelRatio())
     if palette is None:
         palette = QApplication.palette()
     img = QImage(sz, sz, QImage.Format.Format_ARGB32)
diff --git a/src/calibre/gui2/tweak_book/widgets.py b/src/calibre/gui2/tweak_book/widgets.py
index 926bccc508..f4ba02680e 100644
--- a/src/calibre/gui2/tweak_book/widgets.py
+++ b/src/calibre/gui2/tweak_book/widgets.py
@@ -378,7 +378,7 @@ class Results(QWidget):
             self.current_result = 0
             prefixes = [QStaticText(f'<b>{os.path.basename(x)}</b>') for x in results]
             [(p.setTextFormat(Qt.TextFormat.RichText), p.setTextOption(self.text_option)) for p in prefixes]
-            self.maxwidth = max(int(ceil(x.size().width())) for x in prefixes)
+            self.maxwidth = max(ceil(x.size().width()) for x in prefixes)
             self.results = tuple((prefix, self.make_text(text, positions), text)
                 for prefix, (text, positions) in zip(prefixes, iteritems(results)))
         else:
@@ -417,7 +417,7 @@ class Results(QWidget):
                 p.drawStaticText(offset, prefix)
                 offset.setX(self.maxwidth + 5)
                 p.drawStaticText(offset, self.divider)
-                offset.setX(offset.x() + int(ceil(self.divider.size().width())))
+                offset.setX(offset.x() + ceil(self.divider.size().width()))
                 p.drawStaticText(offset, full)
                 offset.setY(int(offset.y() + size.height() + self.MARGIN // 2))
                 if i in (self.current_result, self.mouse_hover_result):
diff --git a/src/calibre/gui2/viewer/highlights.py b/src/calibre/gui2/viewer/highlights.py
index 612ea7b8b2..b49b3375f2 100644
--- a/src/calibre/gui2/viewer/highlights.py
+++ b/src/calibre/gui2/viewer/highlights.py
@@ -110,7 +110,7 @@ def decoration_for_style(palette, style, icon_size, device_pixel_ratio, is_dark)
             q = builtin_decorations.get(which)
             if q is not None:
                 style = q
-        sz = int(math.ceil(icon_size * device_pixel_ratio))
+        sz = math.ceil(icon_size * device_pixel_ratio)
         canvas = QImage(sz, sz, QImage.Format.Format_ARGB32)
         canvas.fill(Qt.GlobalColor.transparent)
         canvas.setDevicePixelRatio(device_pixel_ratio)
diff --git a/src/calibre/utils/filenames.py b/src/calibre/utils/filenames.py
index e821b4af66..9633a79550 100644
--- a/src/calibre/utils/filenames.py
+++ b/src/calibre/utils/filenames.py
@@ -72,7 +72,7 @@ def shorten_components_to(length, components, more_to_take=0, last_has_extension
     deltas = []
     for x in components:
         pct = len(x)/float(len(filepath))
-        deltas.append(int(ceil(pct*extra)))
+        deltas.append(ceil(pct*extra))
     ans = []
 
     for i, x in enumerate(components):
diff --git a/src/calibre/utils/fonts/sfnt/__init__.py b/src/calibre/utils/fonts/sfnt/__init__.py
index 2375c60053..350b19806c 100644
--- a/src/calibre/utils/fonts/sfnt/__init__.py
+++ b/src/calibre/utils/fonts/sfnt/__init__.py
@@ -55,7 +55,7 @@ class FixedProperty:
         return val / 0x10000
 
     def __set__(self, obj, val):
-        return int(round(val*(0x10000)))
+        return round(val*(0x10000))
 
 
 def max_power_of_two(x):
diff --git a/src/calibre/utils/fonts/sfnt/metrics.py b/src/calibre/utils/fonts/sfnt/metrics.py
index 774e2dbe93..31faa04a25 100644
--- a/src/calibre/utils/fonts/sfnt/metrics.py
+++ b/src/calibre/utils/fonts/sfnt/metrics.py
@@ -42,7 +42,7 @@ class FontMetrics:
         self._sig = hash(self.sfnt[b'name'].raw)
 
         # Metrics for embedding in PDF
-        pdf_scale = self.pdf_scale = lambda x: int(round(x*1000./self.units_per_em))
+        pdf_scale = self.pdf_scale = lambda x: round(x*1000./self.units_per_em)
         self.pdf_ascent, self.pdf_descent = map(pdf_scale,
                         (self.os2.typo_ascender, self.os2.typo_descender))
         self.pdf_bbox = tuple(map(pdf_scale, self.bbox))
diff --git a/src/calibre/utils/formatter_functions.py b/src/calibre/utils/formatter_functions.py
index 1c35f7d3d7..db6f30838d 100644
--- a/src/calibre/utils/formatter_functions.py
+++ b/src/calibre/utils/formatter_functions.py
@@ -491,7 +491,7 @@ Throws an exception if ``value`` is not a number.
 
     def evaluate(self, formatter, kwargs, mi, locals, value):
         value = float(value if value and value != 'None' else 0)
-        return str(int(ceil(value)))
+        return str(ceil(value))
 
 
 class BuiltinFloor(BuiltinFormatterFunction):
@@ -506,7 +506,7 @@ an exception if ``value`` is not a number.
 
     def evaluate(self, formatter, kwargs, mi, locals, value):
         value = float(value if value and value != 'None' else 0)
-        return str(int(floor(value)))
+        return str(floor(value))
 
 
 class BuiltinRound(BuiltinFormatterFunction):
@@ -521,7 +521,7 @@ r'''
 
     def evaluate(self, formatter, kwargs, mi, locals, value):
         value = float(value if value and value != 'None' else 0)
-        return str(int(round(value)))
+        return str(round(value))
 
 
 class BuiltinMod(BuiltinFormatterFunction):
diff --git a/src/calibre/utils/ipc/server.py b/src/calibre/utils/ipc/server.py
index 2d4ed61fb4..61b39aa566 100644
--- a/src/calibre/utils/ipc/server.py
+++ b/src/calibre/utils/ipc/server.py
@@ -268,7 +268,7 @@ class Server(Thread):
         and i is the index of the element x in the original list.
         '''
         ans, count, pos = [], 0, 0
-        delta = int(ceil(len(tasks)/float(self.pool_size)))
+        delta = ceil(len(tasks)/float(self.pool_size))
         while count < len(tasks):
             section = []
             for t in tasks[pos:pos+delta]:
diff --git a/src/calibre/utils/matcher.py b/src/calibre/utils/matcher.py
index f5ce696f07..514739e8e7 100644
--- a/src/calibre/utils/matcher.py
+++ b/src/calibre/utils/matcher.py
@@ -67,7 +67,7 @@ def split(tasks, pool_size):
     and i is the index of the element x in the original list.
     '''
     ans, count = [], 0
-    delta = int(ceil(len(tasks) / pool_size))
+    delta = ceil(len(tasks) / pool_size)
     while tasks:
         section = [(count + i, task) for i, task in enumerate(tasks[:delta])]
         tasks = tasks[delta:]
diff --git a/src/calibre/utils/short_uuid.py b/src/calibre/utils/short_uuid.py
index 9b344e20b7..cb7e109fdb 100644
--- a/src/calibre/utils/short_uuid.py
+++ b/src/calibre/utils/short_uuid.py
@@ -38,7 +38,7 @@ class ShortUUID:
         self.alphabet = tuple(sorted(str(alphabet or (string.digits + string.ascii_letters)[2:])))
         self.alphabet_len = len(self.alphabet)
         self.alphabet_map = {c:i for i, c in enumerate(self.alphabet)}
-        self.uuid_pad_len = int(math.ceil(math.log(1 << 128, self.alphabet_len)))
+        self.uuid_pad_len = math.ceil(math.log(1 << 128, self.alphabet_len))
 
     def uuid4(self, pad_to_length=None):
         if pad_to_length is None: