diff --git a/src/ol/tilegrid/tilegrid.js b/src/ol/tilegrid/tilegrid.js
index f3f39ccf28..ff0f894cff 100644
--- a/src/ol/tilegrid/tilegrid.js
+++ b/src/ol/tilegrid/tilegrid.js
@@ -154,6 +154,7 @@ ol.tilegrid.TileGrid.prototype.forEachTileCoordParentTileRange =
 
 
 /**
+ * Get the maximum zoom level for the grid.
  * @return {number} Max zoom.
  * @api
  */
@@ -163,6 +164,7 @@ ol.tilegrid.TileGrid.prototype.getMaxZoom = function() {
 
 
 /**
+ * Get the minimum zoom level for the grid.
  * @return {number} Min zoom.
  * @api
  */
@@ -172,6 +174,7 @@ ol.tilegrid.TileGrid.prototype.getMinZoom = function() {
 
 
 /**
+ * Get the origin for the grid at the given zoom level.
  * @param {number} z Z.
  * @return {ol.Coordinate} Origin.
  * @api stable
@@ -191,6 +194,7 @@ ol.tilegrid.TileGrid.prototype.getOrigin = function(z) {
 
 
 /**
+ * Get the resolution for the given zoom level.
  * @param {number} z Z.
  * @return {number} Resolution.
  * @api stable
@@ -204,6 +208,7 @@ ol.tilegrid.TileGrid.prototype.getResolution = function(z) {
 
 
 /**
+ * Get the list of resolutions for the tile grid.
  * @return {Array.<number>} Resolutions.
  * @api stable
  */
@@ -368,8 +373,9 @@ ol.tilegrid.TileGrid.prototype.getTileCoordForXYAndResolution_ = function(
 
 
 /**
+ * Get a tile coordinate given a map coordinate and zoom level.
  * @param {ol.Coordinate} coordinate Coordinate.
- * @param {number} z Z.
+ * @param {number} z Zoom level.
  * @param {ol.TileCoord=} opt_tileCoord Destination ol.TileCoord object.
  * @return {ol.TileCoord} Tile coordinate.
  * @api
@@ -415,6 +421,7 @@ ol.tilegrid.TileGrid.prototype.getTileRange =
 
 
 /**
+ * Get the tile size for a zoom level.
  * @param {number} z Z.
  * @return {number} Tile size.
  * @api stable
diff --git a/src/ol/tilegrid/wmtstilegrid.js b/src/ol/tilegrid/wmtstilegrid.js
index e00e786399..95e5d999c8 100644
--- a/src/ol/tilegrid/wmtstilegrid.js
+++ b/src/ol/tilegrid/wmtstilegrid.js
@@ -56,6 +56,7 @@ ol.tilegrid.WMTS.prototype.getMatrixId = function(z) {
 
 
 /**
+ * Get the list of matrix identifiers.
  * @return {Array.<string>} MatrixIds.
  * @api
  */
@@ -65,6 +66,7 @@ ol.tilegrid.WMTS.prototype.getMatrixIds = function() {
 
 
 /**
+ * Create a tile grid from a WMTS capabilities matrix set.
  * @param {Object} matrixSet An object representing a matrixSet in the
  *     capabilities document.
  * @return {ol.tilegrid.WMTS} WMTS tileGrid instance.