diff --git a/src/blenderbim/blenderbim/bim/module/qto/__init__.py b/src/blenderbim/blenderbim/bim/module/qto/__init__.py
index 87256a846b..7059281f9f 100644
--- a/src/blenderbim/blenderbim/bim/module/qto/__init__.py
+++ b/src/blenderbim/blenderbim/bim/module/qto/__init__.py
@@ -20,14 +20,15 @@ import bpy
 from . import ui, prop, operator
 
 classes = (
+    operator.AssignBaseQto,
+    operator.CalculateAllQuantities,
     operator.CalculateCircleRadius,
     operator.CalculateEdgeLengths,
     operator.CalculateFaceAreas,
     operator.CalculateObjectVolumes,
     operator.ExecuteQtoMethod,
+    operator.PerformQuantityTakeOff,
     operator.QuantifyObjects,
-    operator.AssignBaseQto,
-    operator.CalculateAllQuantities,
     prop.BIMQtoProperties,
     ui.BIM_PT_qto_utilities,
 )
diff --git a/src/blenderbim/blenderbim/bim/module/qto/operator.py b/src/blenderbim/blenderbim/bim/module/qto/operator.py
index de3084a898..88fa33841c 100644
--- a/src/blenderbim/blenderbim/bim/module/qto/operator.py
+++ b/src/blenderbim/blenderbim/bim/module/qto/operator.py
@@ -197,7 +197,34 @@ class CalculateAllQuantities(bpy.types.Operator, tool.Ifc.Operator):
         return tool.Ifc.get() and context.selected_objects
 
     def _execute(self, context):
-        core.calculate_objects_base_quantities(
+        core.calculate_all_quantities(
             tool.Ifc, tool.Cost, tool.Qto, QtoCalculator(), selected_objects=context.selected_objects
         )
         return {"FINISHED"}
+
+
+class PerformQuantityTakeOff(bpy.types.Operator, tool.Ifc.Operator):
+    bl_idname = "bim.perform_quantity_take_off"
+    bl_label = "Perform Quantity Take-off"
+    bl_options = {"REGISTER", "UNDO"}
+    bl_description = "Perform a quantity take off based of a QTO rule configuration"
+
+    @classmethod
+    def poll(cls, context):
+        return tool.Ifc.get() and context.selected_objects
+
+    def _execute(self, context):
+        import ifc5d.qto
+
+        elements = set()
+        for obj in context.selected_objects:
+            element = tool.Ifc.get_entity(obj)
+            if element:
+                elements.add(element)
+
+        rules = ifc5d.qto.get_rules("IFC4QtoBaseQuantities")
+
+        ifc_file = tool.Ifc.get()
+        results = ifc5d.qto.quantify(ifc_file, elements, rules)
+        ifc5d.qto.edit_qtos(ifc_file, results)
+        return {"FINISHED"}
diff --git a/src/blenderbim/blenderbim/core/qto.py b/src/blenderbim/blenderbim/core/qto.py
index 52aacf6e3a..cf5a9c38e3 100644
--- a/src/blenderbim/blenderbim/core/qto.py
+++ b/src/blenderbim/blenderbim/core/qto.py
@@ -42,7 +42,7 @@ def assign_object_base_qto(ifc, qto, obj):
     )
 
 
-def calculate_objects_base_quantities(ifc, cost, qto, calculator, selected_objects):
+def calculate_all_quantities(ifc, cost, qto, calculator, selected_objects):
     if selected_objects:
         for obj in selected_objects:
             calculate_object_base_quantities(ifc, cost, qto, calculator, obj)
diff --git a/src/ifcopenshell-python/docs/ifcopenshell-python/geometry_processing.rst b/src/ifcopenshell-python/docs/ifcopenshell-python/geometry_processing.rst
index 92512eddc5..18d8f36813 100644
--- a/src/ifcopenshell-python/docs/ifcopenshell-python/geometry_processing.rst
+++ b/src/ifcopenshell-python/docs/ifcopenshell-python/geometry_processing.rst
@@ -228,6 +228,7 @@ Here is a simple example in Python:
     if iterator.initialize():
         while True:
             shape = iterator.get()
+            element = ifc_file.by_id(shape.id)
             matrix = shape.transformation.matrix.data
             faces = shape.geometry.faces
             edges = shape.geometry.edges