Torsion spring calculator
Garage Door Torsion Spring Calculator
Find Spring Options by IPPT + Lift Chart
This calculator uses your uploaded spring spreadsheet only. It compares your current spring setup against the chart and shows matching replacement or upgrade options based on door height, spring count, IPPT, max turns, lifting weight, and estimated cycle life.
1. Door Information
This chart is for torsion springs.
Used for reference/display.
Calculator filters lift data by this height.
Total lift is calculated by spring count.
If entered, this becomes the target lift.
2. Current Spring A
Your spreadsheet uses 400-12 drum data.
3. Current Spring B
Important: This calculator is based on the provided chart and assumes standard 400-12 drums. Always verify spring selection, door weight, hardware condition, and safety requirements before ordering or installing.
Results
How to Measure a Garage Door Torsion Spring
1. Measure wire size
Measure 20 coils and divide by 20. Example: 4.50" ÷ 20 = .225 wire.
Measure 20 coils and divide by 20. Example: 4.50" ÷ 20 = .225 wire.
2. Measure spring length
Measure the relaxed spring coil body only. Do not include cones.
Measure the relaxed spring coil body only. Do not include cones.
3. Check ID + wind
Most residential springs are 2" ID. Red and black usually mark opposite wind directions.
Most residential springs are 2" ID. Red and black usually mark opposite wind directions.