diff --git a/README.md b/README.md
index 689fb04e..a4123dc7 100644
--- a/README.md
+++ b/README.md
@@ -1318,9 +1318,11 @@ Next time you need this list just use an alias, like this:
       * Valid keys:
         - `aggregate`: [list(dict)] Add components from other projects.
           * Valid keys:
+            - *board_qty*: Alias for number.
             - `file`: [string=''] Name of the XML to aggregate.
             - `number`: [number=100] Number of boards to build (components multiplier).
             - `variant`: [string=' '] Variant for this project.
+        - *board_qty*: Alias for number.
         - `currency`: [string|list(string)=USD] Currency priority. Use ISO4217 codes (i.e. USD, EUR).
         - `distributors`: [string|list(string)] Include this distributors list. Default is all the available.
         - `dnf_filter`: [string|list(string)='_none'] Name of the filter to mark components as not fitted.
diff --git a/docs/samples/generic_plot.kibot.yaml b/docs/samples/generic_plot.kibot.yaml
index ff5fefc0..02a1587a 100644
--- a/docs/samples/generic_plot.kibot.yaml
+++ b/docs/samples/generic_plot.kibot.yaml
@@ -765,12 +765,14 @@ outputs:
     options:
       # [list(dict)] Add components from other projects
       aggregate:
+        # `board_qty` is an alias for `number`
         # [string=''] Name of the XML to aggregate
         - file: ''
           # [number=100] Number of boards to build (components multiplier)
           number: 100
           # [string=' '] Variant for this project
           variant: ' '
+      # `board_qty` is an alias for `number`
       # [string|list(string)=USD] Currency priority. Use ISO4217 codes (i.e. USD, EUR)
       currency: USD
       # [string|list(string)] Include this distributors list. Default is all the available
diff --git a/kibot/out_kicost.py b/kibot/out_kicost.py
index ecc2b497..417514d6 100644
--- a/kibot/out_kicost.py
+++ b/kibot/out_kicost.py
@@ -29,6 +29,8 @@ class Aggregate(Optionable):
             """ Variant for this project """
             self.number = 100
             """ Number of boards to build (components multiplier) """
+            self.board_qty = None
+            """ {number} """
 
     def config(self, parent):
         super().config(parent)
@@ -70,6 +72,8 @@ class KiCostOptions(VariantOptions):
             """ [list(dict)] Add components from other projects """
             self.number = 100
             """ Number of boards to build (components multiplier) """
+            self.board_qty = None
+            """ {number} """
 
         super().__init__()
         self.add_to_doc('variant', WARNING_MIX)