2025 Garage Door Spring Calculator
Calculate the correct torsion spring size for your garage door. Input door dimensions, weight, track radius, and desired cycle life for precise spring specifications.
Garage Door Details
Factors Affecting Garage Door Spring Sizing
| Factor | Description | Impact | Typical Range |
|---|---|---|---|
| Door Weight | Total weight of the garage door | Higher weight requires stronger springs | 100-400 lbs |
| Door Height | Height of the door | Taller doors need more turns | 6-9 ft |
| Track Radius | Radius of the track curve | Affects spring torque and turns | 10-15 in |
| Number of Springs | Single or dual spring setup | Two springs split the load | 1-2 |
| Cycle Life | Expected open/close cycles | Higher cycles require thicker wire | 5,000-30,000 |
Frequently Asked Questions
What is a garage door torsion spring?
A torsion spring is a tightly wound coil mounted above the garage door that counterbalances the door's weight by storing energy through twisting.
How do I calculate the right spring size?
Input the door's weight, height, width, and track radius. The calculator determines the spring's wire size, inside diameter, length, and number of turns based on IPPT (Inch Pounds Per Turn).
How do I weigh my garage door?
Lift the door a few inches and place a bathroom scale under the center. If one spring is broken, double the scale reading to account for the remaining spring's lift.
What is IPPT?
IPPT (Inch Pounds Per Turn) measures the torque a spring provides per turn, critical for balancing the door's weight.
Are torsion springs dangerous?
Yes, torsion springs are under high tension and can cause serious injury. Professional installation is recommended.
Tips for Garage Door Spring Replacement
- Weigh the door accurately using a bathroom scale as described.
- Measure track radius carefully to ensure proper spring torque.
- Choose high-cycle springs (e.g., 30,000 cycles) for longevity.
- Ensure springs match (same wire size and length) for dual-spring setups.
- Hire a professional for safe installation due to high tension risks.
Disclaimer: Calculations are based on 2025 engineering standards. Torsion springs are dangerous; consult a professional for installation. Learn how to weigh your door safely.