diff --git a/lib/cartodb/tile_cache.js b/lib/cartodb/tile_cache.js
index bec60e70..b4c3a3f5 100644
--- a/lib/cartodb/tile_cache.js
+++ b/lib/cartodb/tile_cache.js
@@ -55,7 +55,7 @@ function GenericCache (cache_policy, cache_validator) {
     }
 
     me.beforeTileRender = function(req, res, callback) {
-        req.windshaft_start = new Date().getTime()/1000.0;
+        req.windshaft_start = new Date().getTime();
         var key = cache_key(req);
         var tile = me.cache.get(key);
         if(tile) {
@@ -67,9 +67,9 @@ function GenericCache (cache_policy, cache_validator) {
                     callback(null);
                 } else {
                     me.cache_hits++;
-                    var timestamp = new Date().getTime()/1000.0;
+                    var timestamp = new Date().getTime();
                     var delta = timestamp - req.windshaft_start;
-                    tile.cache_time = delta;
+                    tile.cache_time = delta/1000.0;
                     tile.hits++;
                     res.header('X-Cache-hit', 'true');
                     res.send(tile.tile, tile.headers, 200);
@@ -82,13 +82,13 @@ function GenericCache (cache_policy, cache_validator) {
     }
 
     me.afterTileRender = function(req, res, tile, headers, callback) {
-        var timestamp = new Date().getTime()/1000.0;
+        var timestamp = new Date().getTime();
         var delta = timestamp - req.windshaft_start;
         me.cache.put(cache_key(req), {
                 tile: tile,
                 headers: headers,
                 timestamp: timestamp,
-                render_time: delta,
+                render_time: delta/1000.0,
                 hits: 0});
         update_items(me.cache.size || 0);
         callback(null, tile, headers);