diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index 14761903cf..336fa2a1ce 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -1785,14 +1785,14 @@ QString formatNiceTimeOffset(qint64 secs)
 
 QString formatBytes(uint64_t bytes)
 {
-    if(bytes < 1024)
+    if (bytes < 1'000)
         return QObject::tr("%1 B").arg(bytes);
-    if(bytes < 1024 * 1024)
-        return QObject::tr("%1 KB").arg(bytes / 1024);
-    if(bytes < 1024 * 1024 * 1024)
-        return QObject::tr("%1 MB").arg(bytes / 1024 / 1024);
+    if (bytes < 1'000'000)
+        return QObject::tr("%1 kB").arg(bytes / 1'000);
+    if (bytes < 1'000'000'000)
+        return QObject::tr("%1 MB").arg(bytes / 1'000'000);
 
-    return QObject::tr("%1 GB").arg(bytes / 1024 / 1024 / 1024);
+    return QObject::tr("%1 GB").arg(bytes / 1'000'000'000);
 }
 
 qreal calculateIdealFontSize(int width, const QString& text, QFont font, qreal minPointSize, qreal font_size) {
diff --git a/src/qt/trafficgraphwidget.cpp b/src/qt/trafficgraphwidget.cpp
index 5f19928456..f33d784535 100644
--- a/src/qt/trafficgraphwidget.cpp
+++ b/src/qt/trafficgraphwidget.cpp
@@ -98,7 +98,7 @@ void TrafficGraphWidget::paintEvent(QPaintEvent *)
     float val = pow(10.0f, base);
     float val2 = val;
 
-    const QString units     = tr("KB/s");
+    const QString units = tr("kB/s");
     const float yMarginText = 2.0;
 
     // draw lines