diff --git a/app/models/calculator/flat_percent_item_total.rb b/app/models/calculator/flat_percent_item_total.rb
index f43cae017d..83a5674833 100644
--- a/app/models/calculator/flat_percent_item_total.rb
+++ b/app/models/calculator/flat_percent_item_total.rb
@@ -1,18 +1,11 @@
 # frozen_string_literal: false
 
-require 'spree/localized_number'
-
 module Calculator
   class FlatPercentItemTotal < Spree::Calculator
-    extend Spree::LocalizedNumber
-
     preference :flat_percent, :decimal, default: 0
 
-    localize_number :preferred_flat_percent
-
     validates :preferred_flat_percent,
-              numericality: { message: :calculator_preferred_value_error },
-              unless: -> { Spree::Config.enable_localized_number? }
+              numericality: { message: :calculator_preferred_value_error }
 
     def self.description
       Spree.t(:flat_percent)
diff --git a/app/models/calculator/flat_percent_per_item.rb b/app/models/calculator/flat_percent_per_item.rb
index c6a8693fd0..b1b6b2303b 100644
--- a/app/models/calculator/flat_percent_per_item.rb
+++ b/app/models/calculator/flat_percent_per_item.rb
@@ -1,22 +1,15 @@
 # frozen_string_literal: true
 
-require 'spree/localized_number'
-
 class Calculator::FlatPercentPerItem < Spree::Calculator
   # Spree's FlatPercentItemTotal calculator sums all amounts, and then calculates a percentage
   # on them.
   # In the cart, we display line item individual amounts rounded, so to have consistent
   # calculations we do the same internally. Here, we round adjustments at the individual
   # item level first, then multiply by the item quantity.
-  extend Spree::LocalizedNumber
-
   preference :flat_percent, :decimal, default: 0
 
-  localize_number :preferred_flat_percent
-
   validates :preferred_flat_percent,
-            numericality: { message: :calculator_preferred_value_error },
-            unless: -> { Spree::Config.enable_localized_number? }
+            numericality: { message: :calculator_preferred_value_error }
 
   def self.description
     I18n.t(:flat_percent_per_item)
diff --git a/app/models/calculator/flat_rate.rb b/app/models/calculator/flat_rate.rb
index 0cdb2b6fa4..afcdc80b8d 100644
--- a/app/models/calculator/flat_rate.rb
+++ b/app/models/calculator/flat_rate.rb
@@ -1,18 +1,11 @@
 # frozen_string_literal: false
 
-require 'spree/localized_number'
-
 module Calculator
   class FlatRate < Spree::Calculator
-    extend Spree::LocalizedNumber
-
     preference :amount, :decimal, default: 0
 
-    localize_number :preferred_amount
-
     validates :preferred_amount,
-              numericality: { message: :calculator_preferred_value_error },
-              unless: -> { Spree::Config.enable_localized_number? }
+              numericality: { message: :calculator_preferred_value_error }
 
     def self.description
       I18n.t(:flat_rate_per_order)
diff --git a/app/models/calculator/flexi_rate.rb b/app/models/calculator/flexi_rate.rb
index 8a400088b0..40556ef581 100644
--- a/app/models/calculator/flexi_rate.rb
+++ b/app/models/calculator/flexi_rate.rb
@@ -1,22 +1,14 @@
 # frozen_string_literal: false
 
-require 'spree/localized_number'
-
 module Calculator
   class FlexiRate < Spree::Calculator
-    extend Spree::LocalizedNumber
-
     preference :first_item,      :decimal, default: 0.0
     preference :additional_item, :decimal, default: 0.0
     preference :max_items,       :integer, default: 0
 
-    localize_number :preferred_first_item,
-                    :preferred_additional_item
-
     validates :preferred_first_item,
               :preferred_additional_item,
-              numericality: { message: :calculator_preferred_value_error },
-              unless: -> { Spree::Config.enable_localized_number? }
+              numericality: { message: :calculator_preferred_value_error }
 
     def self.description
       I18n.t(:flexible_rate)
diff --git a/app/models/calculator/per_item.rb b/app/models/calculator/per_item.rb
index 8458f4d432..c0525fd384 100644
--- a/app/models/calculator/per_item.rb
+++ b/app/models/calculator/per_item.rb
@@ -1,18 +1,11 @@
 # frozen_string_literal: false
 
-require 'spree/localized_number'
-
 module Calculator
   class PerItem < Spree::Calculator
-    extend Spree::LocalizedNumber
-
     preference :amount, :decimal, default: 0
 
-    localize_number :preferred_amount
-
     validates :preferred_amount,
-              numericality: { message: :calculator_preferred_value_error },
-              unless: -> { Spree::Config.enable_localized_number? }
+              numericality: { message: :calculator_preferred_value_error }
 
     def self.description
       I18n.t(:flat_rate_per_item)
diff --git a/app/models/calculator/price_sack.rb b/app/models/calculator/price_sack.rb
index 30b02be331..86ada80dde 100644
--- a/app/models/calculator/price_sack.rb
+++ b/app/models/calculator/price_sack.rb
@@ -1,24 +1,15 @@
 # frozen_string_literal: false
 
-require 'spree/localized_number'
-
 module Calculator
   class PriceSack < Spree::Calculator
-    extend Spree::LocalizedNumber
-
     preference :minimal_amount, :decimal, default: 0
     preference :normal_amount, :decimal, default: 0
     preference :discount_amount, :decimal, default: 0
 
-    localize_number :preferred_minimal_amount,
-                    :preferred_normal_amount,
-                    :preferred_discount_amount
-
     validates :preferred_minimal_amount,
               :preferred_normal_amount,
               :preferred_discount_amount,
-              numericality: { message: :calculator_preferred_value_error },
-              unless: -> { Spree::Config.enable_localized_number? }
+              numericality: { message: :calculator_preferred_value_error }
 
     def self.description
       I18n.t(:price_sack)
diff --git a/spec/models/calculator/flat_percent_item_total_spec.rb b/spec/models/calculator/flat_percent_item_total_spec.rb
index afcd2ea23a..c9ad3865c9 100644
--- a/spec/models/calculator/flat_percent_item_total_spec.rb
+++ b/spec/models/calculator/flat_percent_item_total_spec.rb
@@ -17,12 +17,6 @@ describe Calculator::FlatPercentItemTotal do
     expect(calculator.compute(line_item)).to eq(1.0)
   end
 
-  context "extends LocalizedNumber" do
-    it_behaves_like "a model using the LocalizedNumber module", [:preferred_flat_percent]
-    it_behaves_like "a Spree Calculator model using the LocalizedNumber module",
-                    [:preferred_flat_percent]
-  end
-
   it "computes amount correctly for a given OrderManagement::Stock::Package" do
     order = double(:order, line_items: [line_item] )
     package = double(:package, order: order)
diff --git a/spec/models/calculator/flat_percent_per_item_spec.rb b/spec/models/calculator/flat_percent_per_item_spec.rb
index 8758cb7e95..b95e08d0ab 100644
--- a/spec/models/calculator/flat_percent_per_item_spec.rb
+++ b/spec/models/calculator/flat_percent_per_item_spec.rb
@@ -19,10 +19,4 @@ describe Calculator::FlatPercentPerItem do
     line_item = Spree::LineItem.new price: 0.86, quantity: 8
     expect(calculator.compute(line_item)).to eq 1.36
   end
-
-  context "extends LocalizedNumber" do
-    it_behaves_like "a model using the LocalizedNumber module", [:preferred_flat_percent]
-    it_behaves_like "a Spree Calculator model using the LocalizedNumber module",
-                    [:preferred_flat_percent]
-  end
 end
diff --git a/spec/models/calculator/flat_rate_spec.rb b/spec/models/calculator/flat_rate_spec.rb
index de8b999d9e..20ca13ec69 100644
--- a/spec/models/calculator/flat_rate_spec.rb
+++ b/spec/models/calculator/flat_rate_spec.rb
@@ -11,9 +11,4 @@ describe Calculator::FlatRate do
     should validate_numericality_of(:preferred_amount).
       with_message("Invalid input. Please use only numbers. For example: 10, 5.5, -20")
   end
-
-  context "extends LocalizedNumber" do
-    it_behaves_like "a model using the LocalizedNumber module", [:preferred_amount]
-    it_behaves_like "a Spree Calculator model using the LocalizedNumber module", [:preferred_amount]
-  end
 end
diff --git a/spec/models/calculator/flexi_rate_spec.rb b/spec/models/calculator/flexi_rate_spec.rb
index f5a45f3b72..5224f5a408 100644
--- a/spec/models/calculator/flexi_rate_spec.rb
+++ b/spec/models/calculator/flexi_rate_spec.rb
@@ -42,11 +42,4 @@ describe Calculator::FlexiRate do
     Calculator::FlexiRate.new(preferred_first_item: 1, preferred_additional_item: 1,
                               preferred_max_items: 1)
   end
-
-  context "extends LocalizedNumber" do
-    it_behaves_like "a model using the LocalizedNumber module",
-                    [:preferred_first_item, :preferred_additional_item]
-    it_behaves_like "a Spree Calculator model using the LocalizedNumber module",
-                    [:preferred_first_item, :preferred_additional_item]
-  end
 end
diff --git a/spec/models/calculator/per_item_spec.rb b/spec/models/calculator/per_item_spec.rb
index c372c91f82..4b0f72ecd8 100644
--- a/spec/models/calculator/per_item_spec.rb
+++ b/spec/models/calculator/per_item_spec.rb
@@ -16,9 +16,4 @@ describe Calculator::PerItem do
     allow(calculator).to receive_messages(calculable: shipping_calculable)
     expect(calculator.compute(line_item).to_f).to eq(50) # 5 x 10
   end
-
-  context "extends LocalizedNumber" do
-    it_behaves_like "a model using the LocalizedNumber module", [:preferred_amount]
-    it_behaves_like "a Spree Calculator model using the LocalizedNumber module", [:preferred_amount]
-  end
 end
diff --git a/spec/models/calculator/price_sack_spec.rb b/spec/models/calculator/price_sack_spec.rb
index 966ee25248..0754848035 100644
--- a/spec/models/calculator/price_sack_spec.rb
+++ b/spec/models/calculator/price_sack_spec.rb
@@ -90,13 +90,4 @@ describe Calculator::PriceSack do
       end
     end
   end
-
-  context "extends LocalizedNumber" do
-    it_behaves_like "a model using the LocalizedNumber module",
-                    [:preferred_minimal_amount, :preferred_normal_amount,
-                     :preferred_discount_amount]
-    it_behaves_like "a Spree Calculator model using the LocalizedNumber module",
-                    [:preferred_minimal_amount, :preferred_normal_amount,
-                     :preferred_discount_amount]
-  end
 end