diff --git a/tests/test_util.py b/tests/test_util.py
index c08426d..c00d5f6 100644
--- a/tests/test_util.py
+++ b/tests/test_util.py
@@ -39,3 +39,7 @@ class TestUtil():
     def test_is_iterable(self):
         assert_equal(Util.is_iterable('foo'), True)
         assert_equal(Util.is_iterable(7), False)
+
+    def test_convert_to_list(obj):
+        assert_equal(isinstance(Util.convert_to_list('foo'), list), True)
+        assert_equal(isinstance(Util.convert_to_list(7), list), False)
\ No newline at end of file
diff --git a/util.py b/util.py
index 5d0de5b..bef6d01 100644
--- a/util.py
+++ b/util.py
@@ -7,3 +7,13 @@ class Util:
             return True
         except TypeError:
             return False
+
+    @classmethod
+    def convert_to_list(self, obj):
+        """Useful when writing functions that can accept multiple types of
+        input (list, tuple, ndarray, iterator).  Checks if the object is a list.
+        If it is not a list, converts it to a list.
+        """
+        if not isinstance(obj, list) and self.is_iterable(obj):
+            obj = list(obj)
+        return obj