Garage Door Torsion Spring Calculator
Enter door weight, drum type, and cycle rating to get a suggested wire gauge, IPPM, and length. Based on DASMA reference tables.
Typical 16×7 steel residential door: 140–180 lb. Insulated: 180–250.
Two-spring systems split the torque load and last longer.
Suggested torsion spring specifications
Wire gauge
.234"
IPPM
1.25
Length (approx.)
~20"
Standard 10,000-cycle spring life. Most OEM installs. Cable travel: ~90". Single-spring system.
Source: Wire gauge / IPPM mapping derived from DASMA reference tables and common manufacturer spring charts.
Garage door spring sizing — FAQ
Common questions about garage door torsion springs.
How is a garage door torsion spring sized?
A torsion spring is sized by door weight (the spring must produce torque equal to the door weight × moment arm), wire gauge, inside diameter, and length. Heavier doors need thicker wire or longer springs (or both). Most residential 16×7 steel doors use a single 2"-ID torsion spring or a paired 2"-ID set.
What is IPPM in garage door spring sizing?
IPPM stands for Inch-Pounds Per Inch (sometimes Inch-Pounds Per Minute, depending on usage). It is the unit of torque rating for a garage door torsion spring — how much lifting force the spring produces per inch of door travel. Higher IPPM = more lifting power, used for heavier doors.
How many cycles does a standard residential torsion spring last?
A standard 10,000-cycle torsion spring lasts approximately 7 years at the US average of 3–5 door cycles per day. Higher-cycle springs (20K, 50K, 100K) are available for busier homes and commercial applications.
Why are torsion springs dangerous to handle?
A wound torsion spring stores a large amount of mechanical energy. If improperly handled — for example, removing the cones without winding bars or with cable still under tension — the spring can release violently and cause severe injury or death. Spring replacement is the most dangerous routine task in the garage door trade and should only be performed by a trained, qualified technician.
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