diff --git a/lib/Epub/Epub.cpp b/lib/Epub/Epub.cpp
index fcd1615..e4b549d 100644
--- a/lib/Epub/Epub.cpp
+++ b/lib/Epub/Epub.cpp
@@ -318,3 +318,16 @@ int Epub::getTocIndexForSpineIndex(const int spineIndex) const {
   Serial.printf("[%lu] [EBP] TOC item not found\n", millis());
   return -1;
 }
+
+size_t Epub::getBookSize() const {
+  return getCumulativeSpineItemSize(getSpineItemsCount() - 1);
+}
+
+// Calculate progress in book
+uint8_t Epub::calculateProgress(const int currentSpineIndex, const float currentSpineRead){
+    size_t prevChapterSize = getCumulativeSpineItemSize(currentSpineIndex - 1);
+    size_t curChapterSize = getCumulativeSpineItemSize(currentSpineIndex) - prevChapterSize;
+    size_t bookSize = getBookSize();
+    size_t sectionProgSize = currentSpineRead * curChapterSize;
+    return round(static_cast<float>(prevChapterSize + sectionProgSize) / bookSize * 100.0);
+}
diff --git a/lib/Epub/Epub.h b/lib/Epub/Epub.h
index d06fa31..1f2dfa9 100644
--- a/lib/Epub/Epub.h
+++ b/lib/Epub/Epub.h
@@ -58,4 +58,7 @@ class Epub {
   int getTocItemsCount() const;
   int getSpineIndexForTocIndex(int tocIndex) const;
   int getTocIndexForSpineIndex(int spineIndex) const;
+
+  size_t getBookSize() const;
+  uint8_t calculateProgress(const int currentSpineIndex, const float currentSpineRead);
 };
diff --git a/src/screens/EpubReaderScreen.cpp b/src/screens/EpubReaderScreen.cpp
index 6b4855e..3825436 100644
--- a/src/screens/EpubReaderScreen.cpp
+++ b/src/screens/EpubReaderScreen.cpp
@@ -326,22 +326,12 @@ void EpubReaderScreen::renderStatusBar() const {
   constexpr auto textY = 776;
 
   // Calculate progress in book
-  size_t prevChapterSize = epub->getCumulativeSpineItemSize(currentSpineIndex - 1);
-  size_t curChapterSize = epub->getCumulativeSpineItemSize(currentSpineIndex) - prevChapterSize;
-  size_t bookSize = epub->getCumulativeSpineItemSize(epub->getSpineItemsCount() - 1);
-  size_t sectionProgSize =
-      static_cast<size_t>(static_cast<float>(section->currentPage) / section->pageCount * curChapterSize);
-  float bookProgress = static_cast<float>(prevChapterSize + sectionProgSize) / bookSize * 100.0;
-  char bookProgressStr[6] = "--.-";
-std:
-  snprintf(bookProgressStr, 6, "%.1f", bookProgress);
-  // Serial.printf("[%lu] [EBP] prevChapterSize: %u bookSize: %u sectionProgSize: %u bookSize:%u Book progress: %s
-  // %%\n", millis(),
-  //     prevChapterSize, bookSize, sectionProgSize, bookSize, bookProgressStr);
+  float sectionChapterProg = static_cast<float>(section->currentPage) / section->pageCount;
+  uint8_t bookProgress = epub->calculateProgress(currentSpineIndex, sectionChapterProg);
 
   // Right aligned text for progress counter
   const std::string progress = std::to_string(section->currentPage + 1) + "/" + std::to_string(section->pageCount) +
-                               "  " + bookProgressStr + "%";
+                               "  " + std::to_string(bookProgress) + "%";
   const auto progressTextWidth = renderer.getTextWidth(SMALL_FONT_ID, progress.c_str());
   renderer.drawText(SMALL_FONT_ID, GfxRenderer::getScreenWidth() - marginRight - progressTextWidth, textY,
                     progress.c_str());