diff --git a/src/bpslabel.cpp b/src/bpslabel.cpp
new file mode 100644
--- /dev/null
+++ b/src/bpslabel.cpp
@@ -0,0 +1,80 @@
+/*
+  Copyright © 2019 Hasan Yavuz Özderya
+
+  This file is part of serialplot.
+
+  serialplot is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  serialplot is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with serialplot.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "bpslabel.h"
+
+const char* BPS_TOOLTIP = "bits per second";
+const char* BPS_TOOLTIP_ERR = "Maximum baud rate may be reached!";
+
+BPSLabel::BPSLabel(PortControl* portControl,
+                   DataFormatPanel* dataFormatPanel,
+                   QWidget *parent) :
+    QLabel(parent)
+{
+    _portControl = portControl;
+    _dataFormatPanel = dataFormatPanel;
+    prevBytesRead = 0;
+
+    setText("0bps");
+    setToolTip(tr(BPS_TOOLTIP));
+
+    connect(&bpsTimer, &QTimer::timeout,
+            this, &BPSLabel::onBpsTimeout);
+
+    connect(portControl, &PortControl::portToggled,
+            this, &BPSLabel::onPortToggled);
+}
+
+void BPSLabel::onBpsTimeout()
+{
+    uint64_t curBytesRead = _dataFormatPanel->bytesRead();
+    uint64_t bytesRead = curBytesRead - prevBytesRead;
+    prevBytesRead = curBytesRead;
+
+    unsigned bits = bytesRead * 8;
+    unsigned maxBps = _portControl->maxBitRate();
+    QString str;
+    if (bits >= maxBps)
+    {
+        // TODO: an icon for bps warning
+        str = QString(tr("!%1/%2bps")).arg(bits).arg(maxBps);
+        setToolTip(tr(BPS_TOOLTIP_ERR));
+    }
+    else
+    {
+        str = QString(tr("%1bps")).arg(bits);
+        setToolTip(tr(BPS_TOOLTIP));
+    }
+    setText(str);
+}
+
+void BPSLabel::onPortToggled(bool open)
+{
+    if (open)
+    {
+        bpsTimer.start(1000);
+    }
+    else
+    {
+        bpsTimer.stop();
+        // if not cleared last displayed value is stuck
+        setText("0bps");
+        setToolTip(tr(BPS_TOOLTIP));
+    }
+}