diff --git a/autotests/kstringhandlertest.h b/autotests/kstringhandlertest.h
--- a/autotests/kstringhandlertest.h
+++ b/autotests/kstringhandlertest.h
@@ -14,6 +14,8 @@
     void obscure();
     void preProcessWrap_data();
     void preProcessWrap();
+    void logicalLength_data();
+    void logicalLength();
 
 private:
     static QString test;
diff --git a/autotests/kstringhandlertest.cpp b/autotests/kstringhandlertest.cpp
--- a/autotests/kstringhandlertest.cpp
+++ b/autotests/kstringhandlertest.cpp
@@ -153,3 +153,22 @@
              replaceZwsp(expected));
 }
 
+void KStringHandlerTest::logicalLength_data()
+{
+    QTest::addColumn<QString>("string");
+    QTest::addColumn<int>("expected");
+
+    QTest::newRow("Latin") << "foo bar baz" << 11;
+    QTest::newRow("Chinese") << QString::fromUtf8("\xe4\xbd\xa0\xe5\xa5\xbd") << 4;
+    QTest::newRow("Japanese") << QString::fromUtf8("\xe9\x9d\x92\xe3\x81\x84\xe7\xa9\xba") << 6;
+    QTest::newRow("Korean") << QString::fromUtf8("\xed\x95\x9c\xea\xb5\xad\xec\x96\xb4") << 6;
+    QTest::newRow("Mixed") << QString::fromUtf8("KDE\xe6\xa1\x8c\xe9\x9d\xa2") << 7;
+}
+
+void KStringHandlerTest::logicalLength()
+{
+    QFETCH(QString, string);
+    QFETCH(int, expected);
+    QCOMPARE(KStringHandler::logicalLength(string), expected);
+}
+
diff --git a/src/lib/text/kstringhandler.h b/src/lib/text/kstringhandler.h
--- a/src/lib/text/kstringhandler.h
+++ b/src/lib/text/kstringhandler.h
@@ -215,5 +215,15 @@
   @since 4.4
 */
 KCOREADDONS_EXPORT QString preProcessWrap(const QString &text);
+
+/**
+  Returns the length that reflects the density of information in the text. In
+  general the character from CJK languages are assigned with weight 2, while
+  other Latin characters are assigned with 1.
+
+  @since 5.41
+*/
+KCOREADDONS_EXPORT int logicalLength(const QString &text);
+
 }
 #endif
diff --git a/src/lib/text/kstringhandler.cpp b/src/lib/text/kstringhandler.cpp
--- a/src/lib/text/kstringhandler.cpp
+++ b/src/lib/text/kstringhandler.cpp
@@ -26,6 +26,7 @@
 #include <QtCore/QRegExp>            // for the word ranges
 #include <QtCore/QCharRef>
 #include <QtCore/QMutableStringListIterator>
+#include <QtCore/QVector>
 
 //
 // Capitalization routines
@@ -339,3 +340,22 @@
     return result;
 }
 
+int KStringHandler::logicalLength(const QString& text)
+{
+    int length = 0;
+    auto chrs = text.toUcs4();
+    for (auto chr : chrs) {
+        auto script = QChar::script(chr);
+        if (script == QChar::Script_Han ||
+            script == QChar::Script_Hangul ||
+            script == QChar::Script_Hiragana ||
+            script == QChar::Script_Katakana ||
+            script == QChar::Script_Yi ||
+            QChar::isHighSurrogate(chr)) {
+            length += 2;
+        } else {
+            length += 1;
+        }
+    }
+    return length;
+}