How to format numbers as thousands separators in Dart

You can use NumberFormat passing a custom format in ICU formatting pattern, take a look in NumberFormat.

import 'package:intl/intl.dart';

void main() {
  var formatter = NumberFormat('#,##,000');
  print(formatter.format(16987));
  print(formatter.format(13876));
  print(formatter.format(456786));
}

Output

16,987
13,876
4,56,786