If you have an American Express gift card, you'll want to know your balance before using it to make sure you have enough to cover your purchase. You can check your American Express gift card balance in one of two ways -- online or over the phone.
From the American Express gift cards website, click on "Check Balance" and enter the 15-digit gift card number. Click "Continue" and you'll be directed to a page that shows you the remaining balance on your card, as well as a list of all transactions made with the card.
Over the Phone
To check your balance over the phone, call American Express customer service at 1-877-297-4438. You can also call the number found on the back of the gift card. Follow the voice prompts and enter the card's number.