diff --git a/tqdm/_tqdm_pandas.py b/tqdm/_tqdm_pandas.py
index 59632d9a..5e9cd429 100644
--- a/tqdm/_tqdm_pandas.py
+++ b/tqdm/_tqdm_pandas.py
@@ -1,7 +1,7 @@
 # future division is important to divide integers and get as
 # a result precise floating numbers (instead of truncated int)
 from __future__ import absolute_import
-
+from __future__ import division
 
 __author__ = "github.com/casperdcl"
 __all__ = ['tqdm_pandas']
@@ -29,20 +29,25 @@ def tqdm_pandas(t):  # pragma: no cover
     https://stackoverflow.com/questions/18603270/
     progress-indicator-during-pandas-operations-python
     """
+    from pandas.core.frame import DataFrame
     from pandas.core.groupby import DataFrameGroupBy
 
     def inner(groups, func, *args, **kwargs):
         """
         Parameters
         ----------
-        groups  : DataFrameGroupBy
-            Grouped data.
+        groups  : DataFrame[GroupBy]
+            (Grouped) data.
         func  : function
-            To be applied on the grouped data.
+            To be applied on the (grouped) data.
 
         *args and *kwargs are transmitted to DataFrameGroupBy.apply()
         """
-        t.total = len(groups) + 1  # pandas calls update once too many
+        t.total = getattr(groups, 'ngroups', None)
+        if t.total is None:  # not grouped
+            t.total = groups.size // len(groups)
+        else:
+            t.total += 1  # pandas calls update once too many
 
         def wrapper(*args, **kwargs):
             t.update()
@@ -55,4 +60,5 @@ def tqdm_pandas(t):  # pragma: no cover
         return result
 
     # Enable custom tqdm progress in pandas!
+    DataFrame.progress_apply = inner
     DataFrameGroupBy.progress_apply = inner
diff --git a/tqdm/tests/tests_pandas.py b/tqdm/tests/tests_pandas.py
index 7737ad4d..9f22d1a5 100644
--- a/tqdm/tests/tests_pandas.py
+++ b/tqdm/tests/tests_pandas.py
@@ -30,6 +30,29 @@ def test_pandas():
                 nexres, our_file.read()))
 
 
+@with_setup(pretest, posttest)
+def test_pandas():
+    """ Test pandas.DataFrame.progress_apply """
+    try:
+        from numpy.random import randint
+        from tqdm import tqdm_pandas
+        import pandas as pd
+    except:
+        raise SkipTest
+ 
+    with closing(StringIO()) as our_file:
+        df = pd.DataFrame(randint(0, 100, (1000, 6)))
+        tqdm_pandas(tqdm(file=our_file, leave=True, ascii=True))
+        df.progress_apply(lambda x: None)
+
+        our_file.seek(0)
+
+        if '/6' not in our_file.read():
+            our_file.seek(0)
+            raise AssertionError("\nExpected:\n{0}\nIn:{1}\n".format(
+                '/6', our_file.read()))
+
+
 @with_setup(pretest, posttest)
 def test_pandas_leave():
     """ Test pandas with `leave=True` """