Torsion Spring Calculator

Calculate the exact spring specifications for your garage door

How to Use This Calculator

This professional torsion spring calculator helps you determine the correct spring size, wire diameter, and tension for your garage door. Measure your door accurately and provide all specifications for the best results.

Important: This calculator provides recommendations based on standard configurations. Consult with a professional before purchasing or installing springs.

Door Specifications
Width of garage door opening
Height of garage door opening
Use a scale (typically 100-200 lbs)
Standard: 4", 4.5", or 5"
Common: 1/8" (0.125) or 3/32" (0.09375)
Most residential doors use 2 springs
Calculation Results
Awaiting Calculation

Fill out the form and click "Calculate" to see your recommended spring specifications.

All fields are required
Understanding Torsion Springs
What is IPPT?

IPPT (Inch-Pounds Per Turn) measures spring force per quarter turn. This is the most critical specification for replacement springs.

Wire Size Matters

Wire diameter determines spring strength and durability. Thicker wire provides more torque. We recommend the optimal size for your door weight.

Inside Diameter

Must match your torsion bar diameter. Standard residential doors use 1.75", 2.0", 2.25", or 2.5" inside diameter springs.

Spring Length

Longer springs (around 75% of door width) provide more cycles and better balance. We optimize length for maximum durability.

Safety Warning

Garage door torsion springs are under extreme tension and can cause serious injury or death if improperly handled.

Professional installation is strongly recommended. If you choose to install springs yourself, use proper safety equipment and follow manufacturer instructions carefully.