Enter the outer disc radius (in), the inner disc radius (in), and the thickness (in) into the Disc Volume Calculator. The calculator will evaluate and display the Disc Volume. 

Disc Volume Formula

The following formula is used to calculate the Disc Volume.

Vdisc = pi*(Ro-Ri)^2*t
  • Where Vdisc is the Disc Volume (in^3)
  • Ro is the outer disc radius (in) 
  • Ri is the inner disc radius (in) 
  • t is the thickness (in) 

To calculate a disc volume, subtract the inner radius from the outer radius, raise the result to the power of 2, then multiply by pi times the thickness.

How to Calculate Disc Volume?

The following example problems outline how to calculate Disc Volume.

Example Problem #1

  1. First, determine the outer disc radius (in).
    1. The outer disc radius (in) is given as 30.
  2. Next, determine the inner disc radius (in).
    1. The inner disc radius (in) is calculated as: 20.
  3. Next, determine the thickness (in).
    1. The thickness (in) is found to be: 5.
  4. Finally, calculate the Disc Volume using the formula above: 

Vdisc = pi*(Ro-Ri)^2*t

Inserting the values from above yields: 

Vdisc = pi*(30-20)^2*5 = 1570.79 (in^3)

Example Problem #2

The variables needed for this problem are provided below:

outer disc radius (in) = 50

inner disc radius (in) = 20

thickness (in) = 10

This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer. 

Vdisc = pi*(Ro-Ri)^2*t = (in^3)