Enter the coefficient of heat transfer, total area, and temperature differential into the calculator to determine the heat loss.

## Heat Loss Formula

The following formula is used to calculate a heat loss.

q = (U * A) * DT

- Where q is the heat loss
- U is the heat transfer coefficient
- A is the area
- DT is the temperature difference between the inside and outside

## Heat Loss Definition

Heat loss is defined as the total energy lost to the transfer of heat between a hotter surface and a colder ambient area.

## Heat Loss Example

How to calculate heat loss?

**First, determine the heat transfer coefficient.**This will typically be a combination of conductive, convective, and radiative heat transfer.

**Next determine the area.**Measure the total surface area that heat can be transferred through.

**Next, determine the temperature differential.**Measure the difference in temperature between the inside and outside spaces.

**Finally, calculate the heat loss.**Using the formula and information above, calculate the heat loss.

## FAQ

**What is heat loss?**

Heat loss is a measure of the total heat transfer through a surface from an inside hotter section to a cooler outside section, hence the term “loss”.