diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index 32890ed0fe7..690d10ee4d0 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -759,14 +759,14 @@ QString formatNiceTimeOffset(qint64 secs)
 
 QString formatBytes(uint64_t bytes)
 {
-    if(bytes < 1024)
+    if(bytes < 1000)
         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 < 1000 * 1000)
+        return QObject::tr("%1 kB").arg(bytes / 1000);
+    if(bytes < 1000 * 1000 * 1000)
+        return QObject::tr("%1 MB").arg(bytes / 1000 / 1000);
 
-    return QObject::tr("%1 GB").arg(bytes / 1024 / 1024 / 1024);
+    return QObject::tr("%1 GB").arg(bytes / 1000 / 1000 / 1000);
 }
 
 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 dabdf9d8872..91a011e59df 100644
--- a/src/qt/trafficgraphwidget.cpp
+++ b/src/qt/trafficgraphwidget.cpp
@@ -79,7 +79,7 @@ void TrafficGraphWidget::paintEvent(QPaintEvent *)
     int base = floor(log10(fMax));
     float val = pow(10.0f, base);
 
-    const QString units     = tr("KB/s");
+    const QString units     = tr("kB/s");
     const float yMarginText = 2.0;
 
     // draw lines
@@ -128,8 +128,9 @@ void TrafficGraphWidget::updateRates()
 
     quint64 bytesIn = clientModel->node().getTotalBytesRecv(),
             bytesOut = clientModel->node().getTotalBytesSent();
-    float inRate = (bytesIn - nLastBytesIn) / 1024.0f * 1000 / timer->interval();
-    float outRate = (bytesOut - nLastBytesOut) / 1024.0f * 1000 / timer->interval();
+    // Rates are in bytes/millisecond which is equal to kilobytes/second
+    float inRate = (bytesIn - nLastBytesIn) * 1.0f / timer->interval();
+    float outRate = (bytesOut - nLastBytesOut) * 1.0f / timer->interval();
     vSamplesIn.push_front(inRate);
     vSamplesOut.push_front(outRate);
     nLastBytesIn = bytesIn;