Enter the area of the room into the calculator to determine the appropriate ceiling fan size. This calculator can also evaluate the area of the room given the fan size is known.

## Ceiling Fan Size Formula

The following formula is used to calculate the appropriate ceiling fan size for a room.

FS = sqrt(A / 1.5)

Variables:

- FS is the fan size in inches A is the area of the room in square feet sqrt is the square root function

To calculate the appropriate ceiling fan size, first determine the area of the room by multiplying its length by its width. Then divide this area by 1.5. Finally, take the square root of the result to get the recommended fan size in inches.

## What is a Ceiling Fan Size?

A ceiling fan size refers to the diameter of the circle that the fan blades create as they rotate, also known as the fan’s sweep. This measurement is typically given in inches and it’s an important factor to consider when choosing a fan for a particular room. The size of the fan should be proportionate to the size of the room to ensure optimal air circulation. Larger fans are suitable for larger rooms as they circulate more air, while smaller fans are ideal for smaller rooms.

## How to Calculate Ceiling Fan Size?

The following steps outline how to calculate the Ceiling Fan Size using the formula: FS = sqrt(A / 1.5).

- First, determine the area of the room in square feet (A).
- Next, divide the area by 1.5.
- Next, take the square root of the result from step 2.
- Finally, you have calculated the Ceiling Fan Size (FS) in inches.

**Example Problem:**

Use the following variables as an example problem to test your knowledge.

Area of the room (A) = 225 square feet