How to Determine Garage Door Spring Size

When it comes to maintaining your garage door, understanding how to measure garage door springs correctly is crucial. This guide will walk you through the process of determining the correct spring size for your garage door, ensuring smooth operation and preventing potential damage.

Understanding Garage Door Springs

Garage door springs are essential components that balance the door’s weight, making it easy to open and close. There are two main types of garage door springs: torsion springs and extension springs. This article focuses on torsion springs, which are the most common in modern garage doors.

Importance of Proper Spring Sizing

Using the correct spring size is vital for the proper functioning of your garage door. Incorrectly sized springs can lead to operational issues, such as the door not opening or closing properly, and can cause additional strain on other parts of the system, potentially leading to costly repairs.

Tools Needed for Measurement

Before you begin the garage door spring size measurement process, gather the following tools:

  • Measuring tape
  • Calipers or a micrometer
  • A sturdy ladder
  • Safety gloves and glasses

Steps to Measure Garage Door Springs

1. Determine the Wire Diameter

The wire diameter is crucial for the torsion spring size calculation. To measure it accurately:

  1. Measure 10 coils: Use the measuring tape to measure the length of 10 coils of the spring.
  2. Calculate the wire diameter: Divide the total length of the 10 coils by 10. This gives you the wire diameter.

2. Measure the Inner Diameter

The inner diameter is the width of the spring from one inside edge to the other. Use calipers or a micrometer for a precise measurement.

3. Determine the Length of the Spring

Measure the length of the spring in its relaxed state from one end to the other. Ensure the spring is not under tension during this measurement.

4. Check the Wind Direction

Torsion springs can be either left-wound or right-wound. To determine the wind direction, look at the end of the spring:

  • If the coils wind clockwise, it’s a left-wound spring.
  • If the coils wind counterclockwise, it’s a right-wound spring.

Using a Garage Door Spring Sizing Guide

After collecting the necessary measurements, refer to a garage door spring sizing guide. These guides help match your measurements with the appropriate spring size. Many manufacturers and garage door repair services provider online sizing guides that can simplify this process.

Professional Help: Fast and Reliable Garage Door Repairs in Hollywood, SC

While it’s possible to measure garage door springs on your own, seeking professional help ensures accuracy and safety. Services like Integrity Garage Door Repair Services offer fast and reliable garage door repairs in Hollywood, SC. They can handle the precise measurements and installation, giving you peace of mind that your garage door will function correctly.


Determining the correct spring for your garage door involves careful measurement and understanding of your door’s requirements. By following the steps outlined in this guide, you can accurately measure garage door springs and use a garage door spring sizing guide to find the right fit. For those in Hollywood, SC, Integrity Garage Door Repair Services offer professional assistance to ensure your garage door is in top working condition.