Sign-in to your email account and click the following link or copy / paste it into your browser's address bar:


https://accounts.google.com/b/0/EditPasswd?hl=en


OR


After signing in with your existing password, look into the top-right corner of your web browser window.  Click the small down arrow next to your email id or profile picture.


Click the "Account" link.



On the next screen, click the "Security" link at the top of the page




On the next screen, click the "Change password" link





On the following screen, enter your current password in the first block and your new password in the next two blocks and click the "Change Password" button.


**Password must be at least 8 characters