diff --git a/include/reHDD.h b/include/reHDD.h
index 0fdf6fc..df32002 100644
--- a/include/reHDD.h
+++ b/include/reHDD.h
@@ -24,6 +24,8 @@
 #include <sys/select.h>
 #include<algorithm>
 #include <cstring>
+#include <sstream>
+#include <iomanip>
 
 
 using namespace std;
diff --git a/src/drive.cpp b/src/drive.cpp
index 67b28f8..cb30cca 100644
--- a/src/drive.cpp
+++ b/src/drive.cpp
@@ -67,12 +67,18 @@ string Drive::sCapacityToText()
 
 
     string Drive::sPowerOnHoursToText(){
+        double dYears = 0U;
+        uint32_t u32Hours = getPowerOnHours();
+        stringstream stream;
 
-        //TODO show in human readable format
-
-        return to_string(getPowerOnHours());
+        dYears = (double) ((double)u32Hours/(double)8760U);
+        
+        stream << fixed << setprecision(2) << dYears;
+        string sRet = to_string(getPowerOnHours()) + " hours or " + stream.str() + " years";
 
+        return sRet; 
     }
+
     string Drive::sPowerCyclesToText(){
         return to_string(getPowerCycles());
     }