diff --git a/sickbeard/providers/speedcd.py b/sickbeard/providers/speedcd.py
index 3d1fb437b4be62a8f0f3f2e0681a7fb0cfe6eec2..749fb07fb978d95210454919f3c7dd0010a37bdb 100644
--- a/sickbeard/providers/speedcd.py
+++ b/sickbeard/providers/speedcd.py
@@ -21,6 +21,7 @@ import re
 
 from sickbeard import logger
 from sickbeard import tvcache
+from sickrage.helper.common import convert_size
 from sickrage.providers.torrent.TorrentProvider import TorrentProvider
 
 
@@ -105,7 +106,9 @@ class SpeedCDProvider(TorrentProvider):
                     download_url = self.urls['download'] % (torrent['id'])
                     seeders = int(torrent['seed'])
                     leechers = int(torrent['leech'])
-                    size = self._convertSize(torrent['size'])
+                    torrent_size = torrent['size']
+
+                    size = convert_size(torrent_size) or -1
 
                     if not all([title, download_url]):
                         continue
@@ -132,27 +135,6 @@ class SpeedCDProvider(TorrentProvider):
     def seed_ratio(self):
         return self.ratio
 
-    @staticmethod
-    def _convertSize(size):
-        modifier = size[-2:].upper()
-        size = size[:-2].strip()
-        try:
-            size = float(size)
-            if modifier in 'KB':
-                size *= 1024 ** 1
-            elif modifier in 'MB':
-                size *= 1024 ** 2
-            elif modifier in 'GB':
-                size *= 1024 ** 3
-            elif modifier in 'TB':
-                size *= 1024 ** 4
-            else:
-                raise
-        except Exception:
-            size = -1
-
-        return long(size)
-
 
 class SpeedCDCache(tvcache.TVCache):
     def __init__(self, provider_obj):