Here is the way that I use to change my WordPress site’s password if I am unable to log in or reset the password to the dashboard.
Log into phpMyAdmin.
Open your WordPress database.
Select the wp_users table and click Browse.
Now click Edit on the user whose password you want to change.
You will change the password in the row user_pass.
You will notice that WordPress stores the passwords as MD5 Hash rather than plain text.
Copy and paste the code you get from the converter into the user_pass field and click Go to save the new password.
Let me know if you run into any issues or have any questions.