diff --git a/lib/transformer/caster/template.rb b/lib/transformer/caster/template.rb
index c8c3e00..3ed9e6e 100644
--- a/lib/transformer/caster/template.rb
+++ b/lib/transformer/caster/template.rb
@@ -1,6 +1,8 @@
 module Transformer
   module Caster
     class Template
+      PRECISION = 14
+
       def initialize
         @template = { area: {}, file_values: {}, graph_values: {} }
       end
@@ -9,6 +11,9 @@ def add_graph_value(graph_method, value)
         key = graph_method.export_key.to_s
         export_method = graph_method.export_method
 
+        # Round all numeric values recursively to PRECISION decimals for consistency
+        value = deep_round(value)
+
         @template.fetch(:graph_values)[key] ||= {}
         @template.fetch(:graph_values).fetch(key).store(export_method, value)
       end
@@ -29,6 +34,22 @@ def get(key)
       def dump
         @template
       end
+
+      private
+
+      # Recursively rounds all Float values to PRECISION decimal places
+      def deep_round(value)
+        case value
+        when Float
+          value.round(PRECISION)
+        when Hash
+          value.transform_values { |v| deep_round(v) }
+        when Array
+          value.map { |v| deep_round(v) }
+        else
+          value
+        end
+      end
     end
   end
 end