diff --git a/plot.cpp b/plot.cpp
--- a/plot.cpp
+++ b/plot.cpp
@@ -28,6 +28,8 @@ Plot::Plot(QWidget* parent) :
     QObject::connect(&zoomer, &Zoomer::unzoomed, this, &Plot::unzoomed);
 
     zoomer.setZoomBase();
+    grid.setPen(Qt::lightGray);
+    grid.attach(this);
 }
 
 void Plot::setAxis(bool autoScaled, double yAxisMin, double yAxisMax)
diff --git a/plot.h b/plot.h
--- a/plot.h
+++ b/plot.h
@@ -18,6 +18,7 @@
 */
 
 #include <qwt_plot.h>
+#include <qwt_plot_grid.h>
 #include "zoomer.h"
 
 class Plot : public QwtPlot
@@ -32,6 +33,7 @@ private:
     bool isAutoScaled;
     double yMin, yMax;
     Zoomer zoomer;
+    QwtPlotGrid grid;
 
     void resetAxes();