diff --git a/src/bonsai/bonsai/bim/module/qto/calculator.py b/src/bonsai/bonsai/bim/module/qto/calculator.py
index 81131ba21c..b5f851d7ba 100644
--- a/src/bonsai/bonsai/bim/module/qto/calculator.py
+++ b/src/bonsai/bonsai/bim/module/qto/calculator.py
@@ -95,6 +95,7 @@ def get_stair_length(obj: bpy.types.Object) -> float:
     stair_length = math.sqrt(pow(length, 2) + pow(height, 2))
     return stair_length
 
+
 def get_footing_length(o: bpy.types.Object) -> float:
     element = tool.Ifc.get_entity(o)
     assert element
@@ -108,6 +109,7 @@ def get_footing_length(o: bpy.types.Object) -> float:
     else:
         return get_length(o)
 
+
 def get_net_stair_area(obj: bpy.types.Object) -> float:
     OBB_obj = get_OBB_object(obj)
     OBB_net_footprint_area = get_net_footprint_area(OBB_obj)
@@ -186,6 +188,7 @@ def get_width(o: bpy.types.Object) -> float:
     y = get_y(o)
     return min(x, y)
 
+
 def get_footing_height(o: bpy.types.Object) -> float:
     element = tool.Ifc.get_entity(o)
     assert element