Garage Door Spring Sizing Calculator (by Door Size and Weight)

Door Details

I know my existing spring specs

Door Width (ft)

Door Height (ft)

Material

Insulation

Door Weight (lbs) — override estimate

Spring System

Number of Springs

Spring Sizing Result

Recommended Spring

Wire Size: 0.207"

Inside Diameter: 3.38"

Length: 18"

IPPT (inch‑pounds per turn): 24.3

Max Turns: 8.7

Per‑spring Lift: 80.0 lbs

Door weight: 80.0 lbs (estimated)

Cycle‑life options (for discussion with supplier):

10,000 cycles (industry standard)
25,000 cycles (vendor confirmed)
50,000 cycles (extrapolated)

Safety warning: Garage door torsion springs and lift cables are under extreme tension. They can cause severe injury or death when released incorrectly. This site does not provide instructions for replacing or adjusting them. This is one of the few home repairs where we tell you plainly: hire a professional.

for ordering the correct part and checking a pro's quote — not installation guidance