<!DOCTYPE html>
<html>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<body>
<div ng-app="myApp" ng-controller="nCtrl">
<h1>{{weight | number : 3}} kg</h1>
</div>
<script>
var app = angular.module('myApp', []);
app.controller('nCtrl', function($scope) {
$scope.weight = 9999;
});
</script>
<p>The weight is written with three decimals.</p>
</body>
</html>