diff --git a/db/seeds.rb b/db/seeds.rb
index 0085c3d..5fa6c9e 100644
--- a/db/seeds.rb
+++ b/db/seeds.rb
@@ -21,3 +21,4 @@ end
 #[Source, Quantity, Unit].each { |model| model.defaults.delete_all }
 
 require_relative 'seeds/units.rb'
+require_relative 'seeds/quantities.rb'
diff --git a/db/seeds/quantities.rb b/db/seeds/quantities.rb
new file mode 100644
index 0000000..8ca9050
--- /dev/null
+++ b/db/seeds/quantities.rb
@@ -0,0 +1,9 @@
+Quantity.transaction do
+  Quantity.defaults.delete_all
+
+  quantities = {}
+
+  quantities['Body weight'] =
+    Quantity.create name: 'Body weight',
+                    description: 'body weight measurement'
+end