diff --git a/src/numberformat.cpp b/src/numberformat.cpp
new file mode 100644
--- /dev/null
+++ b/src/numberformat.cpp
@@ -0,0 +1,42 @@
+/*
+  Copyright © 2016 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 <QMap>
+
+#include "numberformat.h"
+
+QMap<NumberFormat, QString> mapping({
+        {NumberFormat_uint8, "uint8"},
+        {NumberFormat_uint16, "uint16"},
+        {NumberFormat_uint32, "uint32"},
+        {NumberFormat_int8, "int8"},
+        {NumberFormat_int16, "int16"},
+        {NumberFormat_int32, "int32"},
+        {NumberFormat_float, "float"}
+    });
+
+QString numberFormatToStr(NumberFormat nf)
+{
+    return mapping.value(nf);
+}
+
+NumberFormat strToNumberFormat(QString str)
+{
+    return mapping.key(str, NumberFormat_INVALID);
+}