Torsion Spring Selector

Wire size

Spring length (inches)

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Select a wire size and length to see what that spring does.

Garage Door Torsion Spring Calculator

1. Count 20 coils.
2. Measure that distance with a tape (in inches).
3. Enter that number below and the tool will calculate your wire size.

Inside diameter (inches)

20-coil measurement (inches, optional)

If you enter this, wire size will be calculated automatically.

Wire size (inches)

You can type this directly, or let the tool calculate it from 20 coils.

Spring length (inches, body only)

Number of winds (turns)

Try 7, 8, 9 turns to see how lift and life change.

Wire size: –

Estimated lift per spring: – lbs

Estimated cycle rating (rough): –

These numbers are approximate. This first version is for educational use and playing “what if” with different sizes, lengths, and turns.