Enter the object’s volume (m^3) and the object’s density (kg/m^3) into the Float Weight Calculator. The calculator will evaluate the Float Weight. 

Float Weight Formula

The following two example problems outline the steps and information needed to calculate the Float Weight.

FW = V * D * 9.81


  • FW is the Float Weight (N)
  • V is the object’s volume (m^3) 
  • D is the object’s density (kg/m^3) 

How to Calculate Float Weight?

The following steps outline how to calculate the Float Weight.

  1. First, determine the object’s volume (m^3). 
  2. Next, determine the object’s density (kg/m^3). 
  3. Next, gather the formula from above = FW = V * D * 9.81.
  4. Finally, calculate the Float Weight.
  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.

object’s volume (kg) = 10

object’s density (kg/m^3) = 20

FW = V * D * 9.81 = ?