diff --git a/lib/src/base_spin_box.dart b/lib/src/base_spin_box.dart
index fd986d6..c750587 100644
--- a/lib/src/base_spin_box.dart
+++ b/lib/src/base_spin_box.dart
@@ -44,6 +44,7 @@ abstract class BaseSpinBox extends StatefulWidget {
   VoidCallback? get afterChange;
   bool get readOnly;
   FocusNode? get focusNode;
+  String get decimalSeparator;
 }
 
 mixin SpinBoxMixin<T extends BaseSpinBox> on State<T> {
@@ -57,11 +58,11 @@ mixin SpinBoxMixin<T extends BaseSpinBox> on State<T> {
   FocusNode get focusNode => _focusNode;
   TextEditingController get controller => _controller;
   SpinFormatter get formatter => SpinFormatter(
-      min: widget.min, max: widget.max, decimals: widget.decimals);
+      min: widget.min, max: widget.max, decimals: widget.decimals, decimalSeparator: widget.decimalSeparator);
 
-  static double _parseValue(String text) => double.tryParse(text) ?? 0;
+  double _parseValue(String text) => double.tryParse(text.replaceAll(widget.decimalSeparator, '.')) ?? 0;
   String _formatText(double value) {
-    return value.toStringAsFixed(widget.decimals).padLeft(widget.digits, '0');
+    return value.toStringAsFixed(widget.decimals).padLeft(widget.digits, '0').replaceAll('.', widget.decimalSeparator);
   }
 
   Map<ShortcutActivator, VoidCallback> get bindings {
diff --git a/lib/src/cupertino/spin_box.dart b/lib/src/cupertino/spin_box.dart
index 5acdbd4..6330694 100644
--- a/lib/src/cupertino/spin_box.dart
+++ b/lib/src/cupertino/spin_box.dart
@@ -85,6 +85,7 @@ class CupertinoSpinBox extends BaseSpinBox {
     this.beforeChange,
     this.afterChange,
     this.focusNode,
+    this.decimalSeparator = ".",
   })  : assert(min <= max),
         keyboardType = keyboardType ??
             TextInputType.numberWithOptions(
@@ -213,6 +214,12 @@ class CupertinoSpinBox extends BaseSpinBox {
   @override
   final VoidCallback? afterChange;
 
+  /// The decimal separator used for formatting the value.
+  ///
+  /// Defaults to `.`.
+  @override
+  final String decimalSeparator;
+
   /// See [CupertinoTextField.enabled].
   final bool enabled;
 
diff --git a/lib/src/material/spin_box.dart b/lib/src/material/spin_box.dart
index 5758c5d..ac81ae7 100644
--- a/lib/src/material/spin_box.dart
+++ b/lib/src/material/spin_box.dart
@@ -87,6 +87,7 @@ class SpinBox extends BaseSpinBox {
     this.beforeChange,
     this.afterChange,
     this.focusNode,
+    this.decimalSeparator = ".",
   })  : assert(min <= max),
         keyboardType = keyboardType ??
             TextInputType.numberWithOptions(
@@ -218,6 +219,12 @@ class SpinBox extends BaseSpinBox {
   @override
   final VoidCallback? afterChange;
 
+  /// The decimal separator used for formatting the value.
+  ///
+  /// Defaults to `.`.
+  @override
+  final String decimalSeparator;
+
   /// See [TextField.enabled].
   final bool enabled;
 
diff --git a/lib/src/spin_formatter.dart b/lib/src/spin_formatter.dart
index 1806e6f..6b83adb 100644
--- a/lib/src/spin_formatter.dart
+++ b/lib/src/spin_formatter.dart
@@ -25,16 +25,17 @@ import 'package:flutter/services.dart';
 // ignore_for_file: public_member_api_docs
 
 class SpinFormatter extends TextInputFormatter {
-  SpinFormatter({required this.min, required this.max, required this.decimals});
+  SpinFormatter({required this.min, required this.max, required this.decimals, required this.decimalSeparator});
 
   final double min;
   final double max;
   final int decimals;
+  final String decimalSeparator;
 
   @override
   TextEditingValue formatEditUpdate(
       TextEditingValue oldValue, TextEditingValue newValue) {
-    final input = newValue.text;
+    final input = newValue.text.replaceAll(decimalSeparator, '.');
     if (input.isEmpty) {
       return newValue;
     }