diff --git a/src/dataformatpanel.cpp b/src/dataformatpanel.cpp
--- a/src/dataformatpanel.cpp
+++ b/src/dataformatpanel.cpp
@@ -182,7 +182,7 @@ void DataFormatPanel::enableDemo(bool en
 void DataFormatPanel::spsTimerTimeout()
 {
     unsigned currentSps = _samplesPerSecond;
-    _samplesPerSecond = sampleCount/SPS_UPDATE_TIMEOUT;
+    _samplesPerSecond = (sampleCount/_numOfChannels)/SPS_UPDATE_TIMEOUT;
     if (currentSps != _samplesPerSecond)
     {
         emit samplesPerSecondChanged(_samplesPerSecond);