Enter the thickness of material 1 (in), the thickness of material 2 (in), and the diameter of the rivet stem (in) into the Rivet Length Calculator. The calculator will evaluate the Rivet Length. 

Rivet Length Calculator

Enter any 3 values to calculate the missing variable

Rivet Length Formula

The following formula is used to calculate the Rivet Length. 

RL = (T1+T2 + 1.5*D)
  • Where RL is the Rivet Length (in)
  • T1 is the thickness of material 1 (in) 
  • T2 is the thickness of material 2 (in) 
  • D is the diameter of the rivet stem (in) 

To calculate a rivet length, add together the thicknesses of both materials, then add one and a half times the diameter of the stem.

How to Calculate Rivet Length?

The following two example problems outline the steps and information needed to calculate the Rivet Length.

Example Problem #1

  1. First, determine the thickness of material 1 (in).
    • The thickness of material 1 (in) is calculated to be : 2.
  2. Next, determine the thickness of material 2 (in).
    • The thickness of material 2 (in) is measured to be: 3.
  3. Next, determine the diameter of the rivet stem (in).
    • The diameter of the rivet stem (in) is found to be: 4.
  4. Finally, calculate the Rivet Length using the formula above: 

RL = (T1+T2 + 1.5*D)

The values provided above are inserted into the equation below and computed.

RL = (2+3 + 1.5*4) = 11 (in)

Example Problem #2

The variables required for this problem are provided below:

thickness of material 1 (in) = 5

thickness of material 2 (in) = 6

diameter of the rivet stem (in) = 8

Test your knowledge using the equation and check your answer with the calculator.

RL = (T1+T2 + 1.5*D) = (in)