There are several tests you can perform to tell if your door is balanced. Before testing your garage door, disengage your electronic opener.
Raise your door in 1' increments, and the door should stay in place.
When you lower the door, the door lowers in a controlled manner and doesn't slam down.
When you raise the door, the door rises at a controlled pace.
When the door is fully raised in the open position, the bottom of the door should be aligned with the bottom of the header of the door
opening.