diff --git a/analytics/calculate_datasize.sql b/analytics/calculate_datasize.sql
new file mode 100644
index 00000000..19e3204e
--- /dev/null
+++ b/analytics/calculate_datasize.sql
@@ -0,0 +1,74 @@
+/* 
+This is a script to calculate total data size in GiB for each ENTITY_ID (folder or project).
+ENTITY_IDs can be a single Synapse folder/project ID or a list of Synapse folder/proejct IDs seperated by comma
+*/
+
+USE ROLE DATA_ANALYTICS;
+USE DATABASE synapse_data_warehouse;
+USE WAREHOUSE COMPUTE_XSMALL;
+
+-- The list of folders to be checked
+SET
+    ENTITY_IDs = '';
+
+-- Calculate Data Size
+WITH RECURSIVE nodesnapshots
+    -- Column list of the "view"
+    (
+        ID,
+        PARENT_ID,
+        NAME,
+        NODE_TYPE,
+        FILE_HANDLE_ID,
+        ENTITY_ID
+    ) 
+    AS 
+    -- Common Table Expression
+    (
+        -- Anchor Clause
+        SELECT
+            ID,
+            PARENT_ID,
+            NAME,
+            NODE_TYPE,
+            FILE_HANDLE_ID,
+            ID AS ENTITY_ID
+        FROM
+            synapse_data_warehouse.synapse.node_latest
+        WHERE
+            ID IN (
+                SELECT
+                    REPLACE(VALUE, 'syn', '')
+                FROM
+                    TABLE(SPLIT_TO_TABLE($ENTITY_IDs, ','))
+            )
+            
+        UNION ALL
+        
+        -- Recursive Clause
+        SELECT
+            node.ID,
+            node.PARENT_ID,
+            node.NAME,
+            node.NODE_TYPE,
+            node.FILE_HANDLE_ID,
+            nodesnapshots.ENTITY_ID
+        FROM
+            synapse_data_warehouse.synapse.node_latest AS node
+        JOIN 
+            nodesnapshots 
+        ON 
+            node.PARENT_ID = nodesnapshots.ID
+    ) 
+-- This is the "main select".
+SELECT
+    'syn' || nodesnapshots.ENTITY_ID AS ENTITY_ID,
+    sum(filesnapshots.CONTENT_SIZE)/ power(2, 30) AS CONTENT_SIZE_in_GiB
+FROM
+    nodesnapshots
+JOIN 
+    synapse_data_warehouse.synapse.file_latest AS filesnapshots 
+ON 
+    nodesnapshots.file_handle_id = filesnapshots.ID
+GROUP BY
+    nodesnapshots.ENTITY_ID;