Enter the sum of the area of all elements (m^2), the heat capacity (J//kg-K), and the total floor area (m^2) into the Thermal Mass Calculator. The calculator will evaluate and display the Thermal Mass.

## Thermal Mass Formula

The following formula is used to calculate the Thermal Mass.

TM = AE * HC / TFA
• Where TM is the Thermal Mass (J/m^2-K)
• AE is the sum of the area of all elements (m^2)
• HC is the heat capacity (J//kg-K)
• TFA is the total floor area (m^2)

To calculate a thermal mass, multiply the sum of the areas of all elements by the heat capacity, then divide by the floor area.

## How to Calculate Thermal Mass?

The following example problems outline how to calculate Thermal Mass.

Example Problem #1

1. First, determine the sum of the area of all elements (m^2).
• The sum of the area of all elements (m^2) is calculated to be : 30.
2. Next, determine the heat capacity (J//kg-K).
• The heat capacity (J//kg-K) is measured to be: 10.
3. Next, determine the total floor area (m^2).
• The total floor area (m^2) is found to be: 50.
4. Finally, calculate the Thermal Mass using the formula above:

TM = AE * HC / TFA

The values given above are inserted into the equation below and the solution is calculated:

TM = 30 * 10 / 50 = 6 (J/m^2-K)

Example Problem #2

The variables needed for this problem are provided below:

sum of the area of all elements (m^2) = 76

heat capacity (J//kg-K) = 85

total floor area (m^2) = 134

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

TM = AE * HC / TFA = (J/m^2-K)