Changing your password on WordPress is very simple. You can follow these simple step-by-step instructions:
- In the Admin Panel menu, go to USERS
- Click on your username in the list to edit
- In the Edit User screen, scroll down to the New Password section and type in a new password in the two boxes provided. The strength box will show how good (strong) your password is.
- Click the UPDATE PROFILE button
You can also watch the tutorial video below.
The information above was copied from Resetting Your Password.