diff --git a/cloudkitty/collector/ceilometer.py b/cloudkitty/collector/ceilometer.py
index 338db814..9fd9c19f 100644
--- a/cloudkitty/collector/ceilometer.py
+++ b/cloudkitty/collector/ceilometer.py
@@ -90,6 +90,7 @@ class CeilometerCollector(collector.BaseCollector):
         'network.bw.out': 'MB',
         'network.bw.in': 'MB',
         'network.floating': 'ip',
+        'radosgw.usage': 'GB'
     }
 
     def __init__(self, transformers, **kwargs):
@@ -430,3 +431,27 @@ class CeilometerCollector(collector.BaseCollector):
                                             'network.floating')
         return self.t_cloudkitty.format_service('network.floating',
                                                 floating_data)
+
+    def get_radosgw_usage(self,
+                          start,
+                          end=None,
+                          project_id=None,
+                          q_filter=None):
+        active_rgw_stats = self.resources_stats('radosgw.objects.size', start,
+                                                end, project_id, q_filter)
+        rgw_data = []
+        for rgw_stats in active_rgw_stats:
+            rgw_id = rgw_stats.groupby['resource_id']
+            if not self._cacher.has_resource_detail('radosgw.usage', rgw_id):
+                raw_resource = self._conn.resources.get(rgw_id)
+                rgw = self.t_ceilometer.strip_resource_data('radosgw.usage',
+                                                            raw_resource)
+                self._cacher.add_resource_detail('radosgw.usage', rgw_id, rgw)
+            rgw = self._cacher.get_resource_detail('radosgw.usage', rgw_id)
+            rgw_size = decimal.Decimal(rgw_stats.max) / units.Gi
+            rgw_data.append(self.t_cloudkitty.format_item(
+                rgw, self.units_mappings["radosgw.usage"], rgw_size))
+        if not rgw_data:
+            raise collector.NoDataCollected(self.collector_name,
+                                            'radosgw.usage')
+        return self.t_cloudkitty.format_service('radosgw.usage', rgw_data)
diff --git a/cloudkitty/collector/gnocchi.py b/cloudkitty/collector/gnocchi.py
index 1a4551e4..51a086e7 100644
--- a/cloudkitty/collector/gnocchi.py
+++ b/cloudkitty/collector/gnocchi.py
@@ -53,6 +53,7 @@ class GnocchiCollector(collector.BaseCollector):
         'network.bw.out': 'instance_network_interface',
         'network.bw.in': 'instance_network_interface',
         'network.floating': 'network',
+        'radosgw.usage': 'ceph_account',
     }
     metrics_mappings = {
         'compute': [
@@ -73,6 +74,8 @@ class GnocchiCollector(collector.BaseCollector):
             ('network.incoming.bytes', 'max')],
         'network.floating': [
             ('ip.floating', 'max')],
+        'radosgw.usage': [
+            ('radosgw.objects.size', 'max')],
     }
     units_mappings = {
         'compute': (1, 'instance'),
@@ -81,6 +84,7 @@ class GnocchiCollector(collector.BaseCollector):
         'network.bw.out': ('network.outgoing.bytes', 'MB'),
         'network.bw.in': ('network.incoming.bytes', 'MB'),
         'network.floating': (1, 'ip'),
+        'radosgw.usage': ('radosgw.objects.size', 'GB')
     }
     default_unit = (1, 'unknown')
 
@@ -293,6 +297,9 @@ class GnocchiCollector(collector.BaseCollector):
             elif resource.get('type') == 'image':
                 resource_data[qty] = (
                     decimal.Decimal(resource_data[qty]) / units.Mi)
+            elif resource.get('type') == 'ceph_account':
+                resource_data[qty] = (
+                    decimal.Decimal(resource_data[qty]) / units.Gi)
             data = self.t_cloudkitty.format_item(
                 resource_data, unit,
                 decimal.Decimal(
diff --git a/cloudkitty/transformer/ceilometer.py b/cloudkitty/transformer/ceilometer.py
index 90cb7617..683ba29f 100644
--- a/cloudkitty/transformer/ceilometer.py
+++ b/cloudkitty/transformer/ceilometer.py
@@ -65,6 +65,8 @@ class CeilometerTransformer(transformer.BaseTransformer):
         'port_id': ['port_id'],
     }
 
+    radosgw_usage_map = {}
+
     metadata_item = 'metadata'
 
     def _strip_compute(self, data):
@@ -105,6 +107,13 @@ class CeilometerTransformer(transformer.BaseTransformer):
         res_data['floatingip_id'] = data.resource_id
         return res_data
 
+    def _strip_radosgw_usage(self, data):
+        res_data = self.generic_strip('radosgw_usage_size', data)
+        res_data['radosgw_id'] = data.resource_id
+        res_data['user_id'] = data.user_id
+        res_data['project_id'] = data.project_id
+        return res_data
+
     def get_metadata(self, res_type):
         """Return list of metadata available after transformation for given
 
diff --git a/doc/source/admin/rating/hashmap.rst b/doc/source/admin/rating/hashmap.rst
index 2b794a84..38722bdb 100644
--- a/doc/source/admin/rating/hashmap.rst
+++ b/doc/source/admin/rating/hashmap.rst
@@ -34,6 +34,7 @@ the following services are available:
 * network.bw.in
 * network.bw.out
 * network.floating
+* radosgw.usage
 
 Enabled services are defined in the configuration file. By default, only the
 compute service is enabled.
@@ -97,6 +98,7 @@ For an active resource on a collection period, quantity is defined as follow:
 * network.bw.in: ingoing network usage (unit: MB)
 * network.bw.out: outgoing network usage (unit: MB)
 * network.floating: 1 (unit: ip)
+* radosgw.usage: Ceph object storage usage (unit: GB)
 
 Example
 =======
diff --git a/etc/cloudkitty/metrics.yml b/etc/cloudkitty/metrics.yml
index d43c975d..41a4155e 100644
--- a/etc/cloudkitty/metrics.yml
+++ b/etc/cloudkitty/metrics.yml
@@ -20,6 +20,7 @@
     network.bw.in: instance_network_interface
     network.floating: network
     image: image
+    radosgw.usage: ceph_account
 
   services_metrics:
     compute:
@@ -40,6 +41,8 @@
       - image.size: max
       - image.download: max
       - image.serve: max
+    radosgw.usage:
+      - radosgw.objects.size: max
 
   services_units:
     compute:
@@ -54,5 +57,7 @@
       1: ip
     image:
       image.size: MB
+    radosgw.usage:
+      radosgw.objects.size: GB
     default_unit:
       1: unknown