All in One Garage Door
Spring Calculator


   This page contains the following
garage door spring calculators:

Garage Door Torsion Spring Calculator
Garage Door Spring Size
Calculator
Garage Door Spring
Conversion Calculator
Garage Door Spring Tension
Calculator
Garage Door Replacement
Cost Calculator

Garage Door Torsion Spring Calculator

Advanced Garage Door Torsion Spring Calculator

Advanced Garage Door Torsion Spring Calculator

Calculate the correct torsion spring specifications for your garage door based on door measurements or existing spring dimensions

Calculate by Door Specifications

Safety Note

Torsion spring adjustment is extremely dangerous. Always consult a professional garage door technician for spring replacement or adjustment.

Recommended Spring Specifications
Spring Size
-
Quantity
-
Wire Size
-
Turns Needed
-

Calculate by Spring Measurements

Measure Spring
Measurement Guide
Spring Specifications
Wire Size
-
Spring Size
-
Wind Direction
-

How to Measure Your Torsion Spring

Follow these steps carefully to measure your existing torsion spring:

  1. Inside Diameter (ID): Measure the inside diameter of the spring. Typical residential springs are 1.75" or 2".
  2. Wind Direction: Left spring is right-hand wound (RHW), right spring is left-hand wound (LHW).
  3. Wire Size: Measure 10 or 20 coils and compare to the chart. Measure to the nearest 1/16" with no gaps between coils.
  4. Spring Length: Measure the un-wound spring length (do not include cones).

Professional Tip

If one spring is broken, we highly recommend replacing both springs at the same time for balanced operation and safety.

Garage door spring diagram

Note: This calculator provides estimates. Always consult a professional garage door technician for accurate spring selection and installation.

Garage Door Spring Size Calculator

Garage Door Spring Size Calculator

Garage Door Spring Size Calculator

Determine the correct torsion spring specifications for your residential garage door based on door size, weight, and material

If you know your door weight, enter it for more precise results

Spring Specifications Will Appear Here

Enter your door details and click "Calculate"

Recommended Spring Specifications

Door Size: -
Door Material: -
Door Weight: -
Spring Quantity: -
Torsion Spring Size: -

Spring Selection Guidelines

Based on your door width, the following guidelines apply:

  • Most one-car doors 10′ wide and smaller can use one spring
  • Two-car 10'3" and wider use two springs unless shaft limitations require one
  • 2″ diameter springs are always preferred

Residential Torsion Spring Guidelines

  • Most one-car doors 10′ wide and smaller can use one spring.
  • Two-car 10'3″ and wider use two springs unless shaft limitations require one.
  • 2″ diameter springs are always preferred.
  • If one spring cannot be a 2″ diameter, go to two 2″ springs before going to one 2-5/8″ spring.
  • If two springs can't be 2″ in diameter, go to two 2-5/8″ before going to four 2″ springs.

This calculator provides estimates only. Please consult a professional before making decisions.

Garage Door Spring Converison Calculator

Spring Conversion Calculator

Garage Door Spring (Conversion) Calculator

Convert spring specifications and calculate equivalent springs with technical insights

Spring Conversion
Cycle Calculator
Torque Calculator
Format: Wire Length (in) x Wire Diameter (in) x Coil Diameter (in)

Conversion Results

Original Spring: 207x0.25x2 (Right Wound)
Equivalent Spring: 192x0.275x2.5 (Right Wound)
Required Turns: 26.5 turns
New Spring Specification: 192 x 0.275 x 2.5
Torque Comparison
92% of Original Torque
Cycle Life
78% of Original Life

Technical Information

Equivalent Length = (Original Length × Original Diameter⁴) / (New Diameter⁴)
Spring Conversion Principles

When converting springs, the key principle is to maintain the same torque output. This is achieved by adjusting the wire length while changing wire diameter and coil diameter.

Key Formulas
  • Torque = (Wire Diameter⁴ × Modulus of Rigidity) / (8 × Coil Diameter × Active Coils)
  • Spring Rate = (Wire Diameter⁴ × Modulus) / (8 × Coil Diameter³ × Active Coils)
  • Stress = (8 × Torque × Coil Diameter) / (π × Wire Diameter³)
Important Considerations
  • Small changes in wire diameter significantly affect spring performance
  • Increasing coil diameter reduces spring rate and torque
  • Cycle life decreases exponentially with increased stress

Technical Specifications

Spring Parameters

Modulus of Rigidity (G): 11,500,000 psi (for steel)

Wahl Correction Factor (K): 1.25 (typical for garage door springs)

Cycle Life Exponent: ≈10 (for high-cycle fatigue)

Standard Sizes

Wire Diameters: 0.207", 0.218", 0.225", 0.243", 0.250", 0.262", 0.275"

Coil Diameters: 1.75", 2.0", 2.125", 2.25", 2.5", 3.0"

Common Lengths: 24", 30", 36", 42", 48"

Performance Factors

Torque: Rotational force produced by the spring

Spring Rate: Torque per turn (in-lb/turn)

Stress: Force per unit area in the wire material

Garage Door Spring Tension Calculator

Advanced Garage Door Spring Calculator

Garage Door Spring Tension Calculator

Advanced calculator for torsion and extension springs with real-time specifications and safety checks

Door Specifications

Feet
Inches
Feet
Inches
Leave blank to calculate based on material
Recommended: 1.2 to 2.0 (default 1.5)

Spring Configuration

Inches (default: 4")
Inches (residential: 15", commercial: 18")
Inches
Default: 0.5 for 2:1 pulley system

Calculation Results

150 pounds

Torque Requirement

3,375
lb-in (with safety factor)

Required Turns

6.7
turns

Wire Diameter

0.29
inches

Active Coils

36
coils
Safety Note: Calculated shear stress (22,450 psi) is within safe limits for music wire. Always use professional installation and verify calculations.
Disclaimer: This calculator provides estimates only. Garage door springs are under high tension and can be dangerous. Consult a professional garage door technician before installation or repair. The developers accept no liability for injuries or damages resulting from the use of this calculator.

Material Density Reference

Material Weight Range (lbs/sq ft) Used in Calculation
Steel (24 gauge) 1.2–1.5 1.35 lbs/sq ft
Steel (20 gauge) 1.6–2.0 1.8 lbs/sq ft
Wood 2.5–3.5 3.0 lbs/sq ft
Aluminum 1.0–1.5 1.25 lbs/sq ft
Fiberglass 0.8–1.2 1.0 lbs/sq ft
Custom User specified Based on entered weight

Garage Door Spring Replacement Cost Calculator

Garage Door Spring Replacement Cost Calculator

Garage Door Spring Replacement Cost Calculator

Estimate your project costs based on spring type, door configuration, and location

Project Details

Single Door

Typically has 2 springs

$150 - $350

Double Door

Typically has 4 springs

$275 - $700

Torsion Springs

Mounted above door, more durable

$150 - $350 (single)

Extension Springs

Mounted on sides, less expensive

$120 - $200 (single)
+$80 - $150
+$50 - $100
+$300 - $500
+$75 - $150

Safety Warning

Garage door springs are under extreme tension and can cause serious injury or death if handled improperly. Always hire a qualified professional for spring replacement.

Your Cost Estimate

Based on current market rates

Base Spring Replacement: $0
Location Adjustment: +0%
Additional Services: $0
Labor Costs: $100 - $250

Estimated Total Cost

$0
$0 - $0

Prices include parts and professional installation

Spring Lifespan: -
Safety Rating: -
Recommended Maintenance: -

Important Information

Key Considerations

  • Torsion springs last 7-14 years (10,000-20,000 cycles)
  • Extension springs last 4-10 years (5,000-15,000 cycles)
  • Heavier doors require stronger springs
  • Professional installation is strongly recommended
  • Consider converting to torsion system for safety
  • Annual maintenance extends spring lifespan

Safety Information

  • Springs are under extreme tension (200-300 lbs)
  • Never attempt DIY spring replacement
  • Broken springs can cause serious injury
  • Professionals use specialized tools and training
  • Torsion springs are safer when they break
  • Extension springs should have safety cables

Cost Factors

  • Spring type and quality
  • Door size and weight
  • Regional labor rates
  • Time of service (emergency premium)
  • Additional hardware needed
  • Contractor experience level
  • Access difficulty