Enter your garage door weight and setup to get matched torsion spring sizes.
The full weight of the door, glass and hardware included. Everything below is matched to it.
Enter the door's full weight above, glass included. Glass in the top section only makes that panel the heaviest, and it turns horizontal first - so the springs need about 10 lbs less lift. Even glazing (or none) needs no correction.
Doors over 500 lbs require at least 3 springs.