Enter the total chimney volume (ft^3) into the Chimney Weight Calculator. The calculator will evaluate the Chimney Weight. 

Chimney Weight Formula

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

CHIM = CV * 120


  • CHIM is the Chimney Weight (lb)
  • CV is the total chimney volume (ft^3) 

To calculate the chimney weight, multiply the chimney volume in cubic feet by 120.

How to Calculate Chimney Weight?

The following steps outline how to calculate the Chimney Weight.

  1. First, determine the total chimney volume (ft^3). 
  2. Next, gather the formula from above = CHIM = CV * 120.
  3. Finally, calculate the Chimney Weight.
  4. 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.

total chimney volume (ft^3) = 20

CHIM = CV * 120 = ?