diff --git a/app/assets/javascripts/admin/services/variant_unit_manager.js.coffee b/app/assets/javascripts/admin/services/variant_unit_manager.js.coffee
index dbdac44808..eec6130bad 100644
--- a/app/assets/javascripts/admin/services/variant_unit_manager.js.coffee
+++ b/app/assets/javascripts/admin/services/variant_unit_manager.js.coffee
@@ -35,7 +35,4 @@ angular.module("admin.products").factory "VariantUnitManager", ->
       @unitNames[unitType][scale]
 
     @unitScales: (unitType) ->
-      unitScales =
-        'weight': [1.0, 1000.0, 1000000.0]
-        'volume': [0.001, 1.0, 1000.0]
-      unitScales[unitType]
+      (parseFloat(scale) for scale in Object.keys(@unitNames[unitType])).sort()
diff --git a/spec/javascripts/unit/admin/services/variant_unit_manager_spec.js.coffee b/spec/javascripts/unit/admin/services/variant_unit_manager_spec.js.coffee
index 7f9ced4be0..21830cae65 100644
--- a/spec/javascripts/unit/admin/services/variant_unit_manager_spec.js.coffee
+++ b/spec/javascripts/unit/admin/services/variant_unit_manager_spec.js.coffee
@@ -26,3 +26,10 @@ describe "VariantUnitManager", ->
       expect(VariantUnitManager.getUnitName(0.001, "volume")).toEqual "mL"
       expect(VariantUnitManager.getUnitName(1, "volume")).toEqual "L"
       expect(VariantUnitManager.getUnitName(1000, "volume")).toEqual "kL"
+
+  describe "unitScales", ->
+    it "returns a set of scales for unit type weight", ->
+      expect(VariantUnitManager.unitScales('weight')).toEqual [1.0, 1000.0, 1000000.0]
+
+    it "returns a set of scales for unit type volume", ->
+      expect(VariantUnitManager.unitScales('volume')).toEqual [0.001, 1.0, 1000.0]