diff --git a/salt/modules/disk.py b/salt/modules/disk.py
index 4725e09c65e..cd39cc61973 100644
--- a/salt/modules/disk.py
+++ b/salt/modules/disk.py
@@ -40,14 +40,14 @@ def _parse_numbers(text):
 
     try:
         postPrefixes = {
-            "K": "10E3",
-            "M": "10E6",
-            "G": "10E9",
-            "T": "10E12",
-            "P": "10E15",
-            "E": "10E18",
-            "Z": "10E21",
-            "Y": "10E24",
+            "K": "1E3",
+            "M": "1E6",
+            "G": "1E9",
+            "T": "1E12",
+            "P": "1E15",
+            "E": "1E18",
+            "Z": "1E21",
+            "Y": "1E24",
         }
         if text[-1] in postPrefixes:
             v = decimal.Decimal(text[:-1])