diff --git a/src/com/android/settings/SdCardSettings.java b/src/com/android/settings/SdCardSettings.java
index b6935a2..637babe 100644
--- a/src/com/android/settings/SdCardSettings.java
+++ b/src/com/android/settings/SdCardSettings.java
@@ -27,6 +27,7 @@
 import android.os.IMountService;
 import android.os.ServiceManager;
 import android.os.StatFs;
+import android.text.format.Formatter;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
@@ -153,29 +154,7 @@
     }
 
     private String formatSize(long size) {
-        String suffix = null;
-
-        // add K or M suffix if size is greater than 1K or 1M
-        if (size >= 1024) {
-            suffix = "K";
-            size /= 1024;
-            if (size >= 1024) {
-                suffix = "M";
-                size /= 1024;
-            }
-        }
-
-        StringBuilder resultBuffer = new StringBuilder(Long.toString(size));
-
-        int commaOffset = resultBuffer.length() - 3;
-        while (commaOffset > 0) {
-            resultBuffer.insert(commaOffset, ',');
-            commaOffset -= 3;
-        }
-
-        if (suffix != null)
-            resultBuffer.append(suffix);
-        return resultBuffer.toString();
+        return Formatter.formatFileSize(this, size);
     }
 
     OnClickListener mMassStorageListener = new OnClickListener() {
diff --git a/src/com/android/settings/deviceinfo/Memory.java b/src/com/android/settings/deviceinfo/Memory.java
index 75a84b7..53e2a69 100644
--- a/src/com/android/settings/deviceinfo/Memory.java
+++ b/src/com/android/settings/deviceinfo/Memory.java
@@ -31,6 +31,7 @@
 import android.preference.Preference;
 import android.preference.PreferenceActivity;
 import android.preference.PreferenceScreen;
+import android.text.format.Formatter;
 import android.util.Log;
 
 import com.android.settings.R;
@@ -194,25 +195,7 @@
     }
     
     private String formatSize(long size) {
-        String suffix = null;
-        
-        // add KB or MB suffix if size is greater than 1K or 1M
-        if (size >= 1024) {
-            suffix = " KB";
-            size /= 1024;
-            if (size >= 1024) {
-                suffix = " MB";
-                size /= 1024;
-            }
-        }
-        
-        DecimalFormat formatter = new DecimalFormat();
-        formatter.setGroupingSize(3);
-        String result = formatter.format(size);
-                
-        if (suffix != null)
-            result = result + suffix;
-        return result;
+        return Formatter.formatFileSize(this, size);
     }
     
 }