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.

- All Mass Calculators
- Percentage Change in Mass Calculator
- Cylinder Mass calculator
- Floor to Area Ratio Calculator

## 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**

- 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.

- Next, determine the heat capacity (J//kg-K).
- The heat capacity (J//kg-K) is measured to be: 10.

- Next, determine the total floor area (m^2).
- The total floor area (m^2) is found to be: 50.

- 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)