Enter the temperature difference, the R-value, and the overall heat transfer coefficient into the Heat Flow Calculator. The calculator will evaluate the Heat Flow.

## Heat Flow Formula

The following formula is used to calculate the Heat Flow.

HF = dT / R * HTC

Variables:

- HF is the Heat Flow ( )
- dT is the temperature difference
- R is the R-value
- HTC is the overall heat transfer coefficient

To calculate heat flow, divide the temperature difference by the R-value, then multiply by the heat transfer coefficient.

## How to Calculate Heat Flow?

The following steps outline how to calculate the Heat Flow.

- First, determine the temperature difference.
- Next, determine the R-value.
- Next, determine the overall heat transfer coefficient.
- Next, gather the formula from above = HF = dT / R * HTC.
- Finally, calculate the Heat Flow.
- 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.

temperature difference = 4

R-value = 5

overall heat transfer coefficient = 10HF = dT / R * HTC =** ** ?