Go to the MetroCard Balance website.
Locate the MetroCard account number above or below the black strip on the back of the card.
Type the MetroCard account number into the blank data form on the MetroCard balance check resource page. Enter the account number exactly as it appears on the back of the card.
Click the "Go" button to the right of the data form. When the browser screen redirects, the card's balance will be displayed.