Find Spring Constant k 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

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Discover Your Spring Constant (k) with Our Calculator

Looking to determine the spring constant (k) for a specific spring? You're in the right place. The spring constant, denoted as 'k,' represents the rate of force required to move a spring over a defined distance. This distance can be either in inches or millimeters, depending on your preference. With the spring constant units in either inches or millimeters, you can easily calculate the spring force for your specific needs. To find the spring constant, you'll need to have a few key values handy: the shear modulus of the material, spring wire diameter, outer diameter, number of active coils, and Young's modulus of the material. We've provided the spring constant formula on this page, or you can take advantage of our spring constant calculator below. Using our spring calculator, you can determine your effective spring constant and access all the answers related to your springs.

 

Spring Constant Units Formula Equation

k = Gd^4 /[8^3D na] 
G = E/2(1 + V)  
d = D outer - d 

If Spring constant is 1 LBF/inch

it takes 1 lb of force to travel

1 inch of distance

1 LBF/INCH=1LB of force per 1 inch of travel distance

 

WHERE

  • G = Shear modulus of material
  • d = Spring wire diameter
  • D = Outer diameter of spring
  • na = number of active coils
  • E = Young's modulus of material
  • V = Poisson's ratio of material

 

Please note, G is determined by the material's Young's modulus (E) and Poisson's ratio (V). The spring constant is expressed in units of force per inch (LBF/inch), indicating the amount of force required to move the spring one inch.


In simple terms, if your spring constant is 1 LBF/inch, it means it takes 1 pound of force to compress or extend the spring by 1 inch.


We encourage you to use our Spring Creator 5.0, a cutting-edge tool that simplifies these complex calculations and provides you with quick and accurate results. By utilizing this innovative resource, you can easily determine your spring's spring constant and make informed decisions about your spring design.


Unleash the power of Spring Creator 5.0 and experience the ease and accuracy of calculating your spring constant and other essential parameters. Make informed decisions and enjoy the benefits of precise spring design. Try Spring Creator 5.0 today!

 

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

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