United States calculator
Estimate required torque and IPPT before professional spring selection
Enter door weight, drum radius, spring count and working turns to calculate torque per spring and required inch-pounds per turn.
torsion torque diagram
Project inputs
Garage Door Torsion Spring Reference Calculator results
How this Garage Door Torsion Spring Reference Calculator works
This reference computes torque demand only. Wire size, inside diameter, length, cycle life and winding direction require a verified spring database and field measurements.
Important: Torsion springs store lethal energy. Do not select, wind or replace a spring without a trained garage-door professional.
What assumptions should I verify?
Check every entered quantity, unit, rate and rule against the current U.S. source that applies to your project. The calculator does not silently substitute worldwide conventions.
Is information sent anywhere?
No. Calculations run locally in the browser and the module contains no analytics, remote requests or stored personal data.