# Suspension Coil Spring Rate Equations Formulas Design Calculator

## Automobile Car Truck Design Formulas

Solving for mean coil diameter.

#### Inputs:

 material rigidity or torsional modulus (G) pascalatmospherebardyne/centimeter^2foot of waterinch of mercuryinch of waterkilonewton/meter^2millibarmillimeter of mercurynewton/meter^2pound/foot^2pound/inch^2torr
 spring rate constant (k) newton/meterpound/footpound/inch
 number of active coils (n)

#### Conversions:

 material rigidity or torsional modulus (G)= 0 = 0pound/inch^2
 wire diameter (d)= 0 = 0inch
 spring rate constant (k)= 0 = 0pound/inch
 number of active coils (n)= 0 = 0

#### Solution:

 mean coil diameter (D)= 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