# Suspension Coil Spring Rate Equations Formulas Design Calculator

## Automobile Car Truck Design Formulas

Solving for rigidity or torsional modulus.

#### Inputs:

 spring rate constant (k) newton/meterpound/footpound/inch
 number of active coils (n)
 mean coil diameter (D) meterangstromattometercentimeterchaindekameterdecimeterexameterfemtometerfootgigameterhectometerinchkilometerlight yearlinkmegametermicrometermicronmilemillimeternanometerparsecpetameterpicometerrodterameteryard
 wire diameter (d) meterangstromattometercentimeterchaindekameterdecimeterexameterfemtometerfootgigameterhectometerinchkilometerlight yearlinkmegametermicrometermicronmilemillimeternanometerparsecpetameterpicometerrodterameteryard

#### Conversions:

 spring rate constant (k)= 0 = 0pound/inch
 number of active coils (n)= 0 = 0
 mean coil diameter (D)= 0 = 0inch
 wire diameter (d)= 0 = 0inch

#### Solution:

 material rigidity or torsional modulus (G)= NOT CALCULATED

#### Other Units:

Change Equation
Select to solve for a different unknown
 spring rate constant rigidity or torsional modulus wire diameter number of active coils mean coil diameter

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By Jimmy Raymond

Contact: aj@ajdesigner.com