Enter your door measurements to estimate how many turns each torsion spring needs. This is an approximation see safety notes below.

Common: 7 ft or 8 ft. You can enter decimals (e.g. 7.5).
Most residential doors use 2 torsion springs for balance.
Quick formula used: turns ≈ door height (ft) + 0.5

About this estimate

This calculator uses a commonly used approximation where the number of full turns required per torsion spring is roughly the door height in feet plus 0.5 turns (e.g., a 7 ft door ≈ 7.5 turns). This is a general guideline, actual needed turns also depend on spring dimensions, wire size, cable drums, and door weight.

Safety disclaimer

Garage door springs are under high tension and can cause serious injury or death if handled incorrectly. This tool provides an estimate for informational purposes only. Always follow manufacturer instructions and consider hiring a trained technician for winding/unwinding springs.

Made for quick estimates • Not a substitute for professional service