Garage Spring by Weight Calculator

Results assume a residential sectional door with standard lift, standard D400-style cable drums using the drum's high moment arm, and 2-inch inside-diameter torsion springs. Spring lengths are rounded to the nearest half-inch. This tool favors spring sizes we sell if they are within a small tolerance of the required torque. Larger-wire alternatives are higher-cycle/longer lasting options (confirm sufficient shaft space is available).