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Compression Springs Compression Springs

Enter your Outside Diameter and Free Length
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Inside Diameter
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Free Length
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Wire Diameter
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Total Coils
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Rate
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Material Type
Max. Load
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Max. Deflection
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Solid Height
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*Required Field
Extension Springs Extension Springs

Enter your Outside Diameter and Length Inside Hook
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Outside Diameter
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Length Inside Hook
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Wire Diameter
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Max. Load
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Max. Deflection
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Initial Tension
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Rate
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Material Type
*Required Field
Torsion Springs Torsion Springs

Enter your Outside Diameter and Total Coils
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Outside Diameter
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Inside Diameter
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Total Coils
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Free Position
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Wire Diameter
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Body Length
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Max. Torque
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Max. Deflection
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Rate
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Leg Length
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Material Type
*Required Field
Conical Springs Conical Springs

Enter you Small Outside Diameter, Large Outside Diameter and Free Length
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Small Outside Diameter
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Large Outside Diameter
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Free Length
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Rate
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Total Coils
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Solid Height
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Wire Diameter
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Material Type
*Required Field

Find Spring Constant k Units 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!