Enter the initial mass (kg) and the velocity (kg) into the Calculator. The calculator will evaluate the Mass Dilation. 

Mass Dilation Formula

MD = m / SQRT(1-v^2/c^2)


  • MD is the Mass Dilation (kg)
  • m is the initial mass (kg)
  • v is the velocity (kg)

To calculate Mass Dilation, divide the initial mass by the result of the square root of 1 minus the ratio of the velocity squared over the speed of light squared.

How to Calculate Mass Dilation?

The following steps outline how to calculate the Mass Dilation.

  1. First, determine the initial mass (kg). 
  2. Next, determine the velocity (kg). 
  3. Next, gather the formula from above = MD = m / SQRT(1-v^2/c^2).
  4. Finally, calculate the Mass Dilation.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

initial mass (kg) = 75

velocity (kg) = 60