If you have a Home Depot gift card and you'd like to find out your Home Depot gift card balance, there are a few ways to go about doing it. First, you could try calling the number on the back of the card and type in the card number when prompted. However, if you're going to be buying things with your gift card anyway, you may want to consider just going to Home Depot and asking about your Home Depot gift card balance at checkout. Generally, you will be able to see how much is left on your card on the receipt.