The library creates and manages per-zoom-level clusters for large amounts of markers. Google API v3. It also includes recalculateClusters functionality.

google, marker, cluster, clusterer, javascript, js, api, v3
bower install js-marker-clusterer-recalc


This version of Marker Clusterer includes a recalculateClusters() public function. The getCalculator() method is updated as well. It now takes into account the visibility of a marker.

It can be used to switch visibility on a marker and refresh the numbers of the clustericons afterwards. Only the visible markers will be counted.

Bower: bower install js-marker-clusterer-recalc

Marker Clusterer – A Google Maps JavaScript API utility library

A Google Maps JavaScript API v3 library to create and manage per-zoom-level clusters for large amounts of markers. Analytics

Reference documentation

Migrated from the Google Maps JavaScript API utility libraries on Google Code.

Live Demos

Marker Clusterer Screenshot

Examples page


Want to contribute? Check out the contributing guide!


Copyright 2014 Google Inc. All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at


Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.