Spring Constant Units Calculator

ENTER YOUR DIMENSIONS

Select Your Spring Type

compression

COMPRESSION

extension

EXTENSION

torsion

TORSION

Select Your Unit of Measurement

Attention:

Input results shown will be +/- 10% from middle value.
Hint: The closer your min and max inputs are, the more accurate your results will be!

Wire Diameter

Wire Diameter

Design type  
Min Max - IN

Outer Diameter

Outer Diameter

Inner Diameter

Design type  
Min Max - IN
Free Length

Free Length

Design type  
Min Max - IN
Total Coils

Total Coils

Design type  
Min Max -  
Material Type

Material Type

spring-wire-diameter

End Types

Wind Direction

Wind Direction

Wire Diameter

Wire Diameter

Design type  
Min Max - IN
Outer Diameter

Outer Diameter

Design type  
Min Max - IN
Length Inside Hooks

Length Inside
Hooks

Design type  
Min Max - IN
Material Type

Material Type

Hook Types

Hook Types

Wire Diameter

Wire Diameter

Design type  
Min Max - IN

Outer Diameter

Outer Diameter

Inner Diameter

Design type  
Min Max - IN
Leg Length 1

Leg Length 1

IN
Leg Length 2

Leg Length 2

IN
Free Position

Free Position or Leg Position in degrees

Design type  
Min Max -  
Total Coils

Total Coils

Design type  
Min Max -  
Material Type

Material Type

Wind Direction

Wind Direction

icon_ok_b Congratulations! you have a good spring design!
icon_ok_b Your design has Warnings!

Warning Messages

Table of Content:

Discover the Power of Spring Constant Units in Your Design Process

​​​​​​In today's fast-paced engineering landscape, precision and efficiency are paramount. The spring constant, a fundamental aspect of spring design, plays a pivotal role in your compression, extension, and torsion spring projects. This article is your gateway to mastering the art of spring constant units, which are measured in pounds of force per inch (lbf/in) or newtons per millimeter (N/mm) for compression and extension springs. For torsion springs, it's inch-pounds of torque per 360º (degrees) or inch-pounds of torque per degree in the imperial system, and newtons per millimeter per 360º (degrees) or newtons per millimeter per degree in the metric system.

 

 

Compression And Extension Spring Rate

The spring constant is the linchpin of your compression and extension spring design, offering a linear force that you can fine-tune to meet your exact needs. Whether you're working with pounds of force (lbf) or newtons (N), the spring constant for load, or inches (in) and millimeters (mm) for travel, Spring Creator 5.0 provides the tools you need. Our formulas and diagrams will simplify the process, enabling you to calculate your compression or extension spring’s constant with precision and ease.

Constant Formula A.)

To calculate how much spring constant you need.

Use the formula k = F ÷ X to calculate the spring constant you require for your specific project. With Spring Creator 5.0, this task becomes a breeze.

 

Rate Formula B.)

To calculate spring constant of a spring.

  • d = Wire Diameter
  • D outer = Outer Diameter
  • D = Mean Diameter
  • E = Young’s Modulus of Material
  • G = Shear Modulus of Material
  • L free = Free Length
  • k = Spring Rate (Spring Constant)
  • na = Active Coils
  • v = Poison’s Ratio of Material
D = D outer – d
G = E ÷ 2 ( 1 + V )
k = Gd^4 ÷ (8D^3 * na)

Incorporate these variables into the formula k = Gd^4 ÷ (8D^3 * na) to determine the spring rate or constant for your specific spring design. Our innovative Spring Creator 5.0 model feature simplifies the process, making it accessible and efficient for all your spring projects.

 

 

Unlocking the Secrets of Torsion Spring Constants

When it comes to torsion springs, understanding the spring constant is crucial for harnessing the radial force they provide. The torsion spring rate signifies the constant force or torque exerted per every 360 degrees of deflection, or even per a single degree of deflection.

Torque Formula A: Calculating Torsion Spring Rate per 360º (Degrees)

  • d = wire size (inches)
  • D = Mean Diameter (inches)
  • N = Number of active coils
  • E = Modulus of Elasticity
  • R = Rate per 360º
  • R2 = Rate per Degree
R = Ed^4 / 10.8 DN
R2 = R ÷ 360

Utilize the formula R = Ed^4 / (10.8DN) to determine the torsion spring rate per 360º (degrees). This is essential for a precise and functional torsion spring design.

 

 

Torque Formula B: Computing Torsion Spring Rate per Degree

  • k2 = Rate per Degree
  • X = Distance Traveled
  • F = Torque or Load
k = F ÷ X

For calculating the torsion spring rate per degree, use the formula k = F ÷ X. This enables you to determine the spring's constant on a degree-by-degree basis, ensuring precise performance in your torsion spring applications.

 

 

Explore the World of Spring Constant Units with Spring Creator 5.0

Welcome to the future of spring design. Spring Creator 5.0 brings precision and ease to your engineering projects, helping you harness the power of spring constants like never before. Whether it's compression, extension, or torsion springs, our innovative platform provides the tools you need to calculate spring constants, streamline your design process, and achieve engineering excellence. Don't wait—embrace the future with Spring Creator 5.0 today.

 

 

Created by Alfonso Jaramillo J
President Acxess Spring
Over 40 Years of Experience in Spring Engineering and Manufacturing

loading

Your 3D is being generated, 3D generation Will take approximately 15 seconds. Your 3D Will load automatically on this page.

Spring Creator is an Acxess Spring Product,
You will be redirected to acxesspring.com for your purchase

Click to open acxesspring.com

loader icon