diff --git a/lib/InfluxPHP/BaseHTTP.php b/lib/InfluxPHP/BaseHTTP.php
index 40e0b59..077a6d5 100644
--- a/lib/InfluxPHP/BaseHTTP.php
+++ b/lib/InfluxPHP/BaseHTTP.php
@@ -44,6 +44,15 @@ class BaseHTTP
     protected $user;
     protected $pass;
     protected $base;
+    protected $timePrecision = 's';
+    protected $children = array();
+
+    const SECOND        = 's';
+    const MILLISECOND   = 'm';
+    const MICROSECOND   = 'u';
+    const S     = 's';
+    const MS    = 'm';
+    const US    = 'u';
 
     protected function inherits(BaseHTTP $c)
     {
@@ -51,6 +60,8 @@ class BaseHTTP
         $this->pass   = $c->pass;
         $this->port   = $c->port;
         $this->host   = $c->host;
+        $this->timePrecision = $c->timePrecision;
+        $c->children[] = $this;
     }
 
     protected function getCurl($url, Array $args = [])
@@ -85,6 +96,29 @@ class BaseHTTP
         return $this->execCurl($ch);
     }
 
+    public function getTimePrecision()
+    {
+        return $this->timePrecision;
+    }
+
+    public function setTimePrecision($p)
+    {
+        switch ($p) {
+        case 'm':
+        case 's':
+        case 'u':
+            $this->timePrecision = $p;
+            if ($this instanceof Client) {
+                foreach ($this->children as $children) {
+                    $children->timePrecision = $p;
+                }
+            }
+            return $this;
+        }
+        
+        throw new \InvalidArgumentException("Expecting m,s or u");
+    }
+
     protected function get($url, Array $args = [])
     {
         $ch = $this->getCurl($url, $args);
diff --git a/lib/InfluxPHP/DB.php b/lib/InfluxPHP/DB.php
index 10d8ac8..523023b 100644
--- a/lib/InfluxPHP/DB.php
+++ b/lib/InfluxPHP/DB.php
@@ -82,7 +82,7 @@ class DB extends BaseHTTP
 
     public function query($sql)
     {
-        return new Cursor($this->get('series', ['q' => $sql]));
+        return new Cursor($this->get('series', ['q' => $sql, 'time_precision' => $this->timePrecision]));
     }
 
     public function createUser($username, $password)
diff --git a/tests/DBTest.php b/tests/DBTest.php
index a245a88..90e7cba 100644
--- a/tests/DBTest.php
+++ b/tests/DBTest.php
@@ -47,6 +47,31 @@ class DBTest extends \phpunit_framework_testcase
         $client->test_xxx->drop();
     }
 
+    public function testTimePrecision()
+    {
+        $client = new Client;
+        $this->assertEquals('s', $client->getTimePrecision());
+        $db = $client->createDatabase("test_yyyy");
+        $this->assertEquals('s', $db->getTimePrecision());
+
+
+        $client->setTimePrecision('m');
+        $this->assertEquals('m', $client->getTimePrecision());
+        $this->assertEquals('m', $db->getTimePrecision());
+
+        $db1 = $client->createDatabase("test_yyyx");
+        $this->assertEquals('m', $db->getTimePrecision());
+    }
+
+    /** 
+     * @expectedException InvalidArgumentException 
+     */
+    public function testInvalidTimePrecision()
+    {
+        $client = new Client;
+        $client->SetTimePrecision([]);
+    }
+
     public function testQuery()
     {
         $client = new Client;