Enter the thickness (in) and the maximum thermal conductivity (Btu-in/h-ft^2-F) into the Calculator. The calculator will evaluate the Max R-Value.

## Max R-Value Formula

R = T / MTC

Variables:

- R is the Max R-Value ()
- T is the thickness (in)
- MTC is the maximum thermal conductivity (Btu-in/h-ft^2-F)

To calculate Max R-Value, divide the thickness by the maximum thermal conductivity.

## How to Calculate Max R-Value?

The following steps outline how to calculate the Max R-Value.

- First, determine the thickness (in).
- Next, determine the maximum thermal conductivity (Btu-in/h-ft^2-F).
- Next, gather the formula from above = R = T / MTC.
- Finally, calculate the Max R-Value.
- 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.

thickness (in) = 378

maximum thermal conductivity (Btu-in/h-ft^2-F) = 4.123