In this short article, we are going to learn how to round a number to n decimal places in Dart/Flutter. Or in other words, we format a number to a decimal number with N digits after decimal point.

Let’s go directly into the demo because there is no special things to explain   🧑‍🎄 🧑‍🎄 🧑‍🎄

void main() {
  double number = double.parse(1.2345.toStringAsFixed(2));
  print(number); // 1.23 

  number = double.parse(1.2356.toStringAsFixed(2));
  print(number); // 1.24

  number = double.parse((-1.2345).toStringAsFixed(2));
  print(number); // -1.23

  number = double.parse((-1.2356).toStringAsFixed(2));
  print(number); // -1.24
}

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Phuc Tran

Creator of Coflutter.
Daddy at home.
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