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Hollow Round Elastic Section Modulus Calculator

This calculator calculates the section modulus for a hollow round section. This is done with the equation below.

S=π(R4−r4)4R =π(D4−d4)32DS = \frac{\pi(R^4-r^4)}{4R}\ = \frac{\pi (D^4-d^4)}{32D}

The following are the variables for the equations...

  1. 
    
    = the section modulus
  2. 
    
    = the inner radius of the circle.
  1. 
    
    = the outer radius of the circle.
  1. 
    
    = the inner diameter of the circle.
  1. 
    
    = the outer diameter of the circle.
Figure 1: Diagram of the Circular Hollow Section to Calculate the Section Modulus


Rectangle Section Modulus Calculator

Inputs



Inner Radius, r
:0.50mm​



Outer Radius, R
:1.00mm​



Inner Diameter, d
:1.00mm​



Outer Diameter, D
:2.00mm​


Output



Section Modulus, S (eqn 1)
:0.74mm3​


Sequation 1=π(R4−r4)4RS_{equation\ 1} = \frac{\pi(R^4-r^4)}{4R}


Section Modulus, S (eqn 2)
:0.74mm3​


Sequation 2=π(D4−d4)32DS_{equation\ 2} = \frac{\pi (D^4-d^4)}{32D}

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