diff --git a/tailbone/forms2/core.py b/tailbone/forms2/core.py
index d613681b..48e36ad6 100644
--- a/tailbone/forms2/core.py
+++ b/tailbone/forms2/core.py
@@ -26,6 +26,7 @@ Forms Core
 
 from __future__ import unicode_literals, absolute_import
 
+import datetime
 import logging
 
 import six
@@ -33,7 +34,7 @@ import sqlalchemy as sa
 from sqlalchemy import orm
 from sqlalchemy.ext.associationproxy import AssociationProxy, ASSOCIATION_PROXY
 
-from rattail.util import prettify, pretty_boolean
+from rattail.util import prettify, pretty_boolean, pretty_hours
 
 import colander
 from colanderalchemy import SQLAlchemySchemaNode
@@ -286,6 +287,8 @@ class Form(object):
     def set_type(self, key, type_):
         if type_ == 'datetime':
             self.set_renderer(key, self.render_datetime)
+        elif type_ == 'duration':
+            self.set_renderer(key, self.render_duration)
         elif type_ == 'boolean':
             self.set_renderer(key, self.render_boolean)
             self.set_widget(key, dfwidget.CheckboxWidget(true_val='True', false_val='False'))
@@ -398,6 +401,12 @@ class Form(object):
             return ""
         return raw_datetime(self.request.rattail_config, value)
 
+    def render_duration(self, record, field_name):
+        value = self.obtain_value(record, field_name)
+        if value is None:
+            return ""
+        return pretty_hours(datetime.timedelta(seconds=value))
+
     def render_boolean(self, record, field_name):
         value = self.obtain_value(record, field_name)
         return pretty_boolean(value)