How Many In-Ceiling Speakers Do I Need?

As you’re planning the audio requirements for a room – specially your media or entertainment room it would make sense to consider the use of ceiling speakers. These speakers

  • Minimize clutter,
  • Provide a more immersive audio experience and
  • Enable more flexibility in your room layout (speakers won’t interfere with furniture for instance)

How many ceiling speakers do you need?

This calculator helps find the number of ceiling mount speakers that are required for a room of any size (specified in square feet or meters).


  • Height of the ceiling (feet/meters)
  • Floor area (ft2/m2)

Example Calculation

Consider a room with a ceiling height of 3 meters. A single speaker will cover a diameter of 9 meters and area of 63.6 m2.

If the total floor area of the room is 800 m2 then a total of 13 speakers are required.

As the height of the speakers above the floor is increased, the area covered also increases.


  • Diameter of the area that a single speaker covers on the floor d = h*3
  • Area covered by a single speaker A = π*(0.5*d)2
  • Total Number of Speakers = Floor Area/A

How many ceiling speakers are required per square feet?

The number of speakers required per square feet is 1/A (where A is the area covered by a single speaker in square feet). In the above example, with a ceiling height of 3 meters, a single speaker will cover 63.6 m2 or 685 square feet. In this case, 1/685 = 0.0015 speakers are required per square foot.

Number of Ceiling Speakers vs Room Area

This table provides the number of speakers required for a room with a certain square footage. The ceiling height is assumed to be 8 feet.

Room Area (Sq. Feet)Number of Speakers


[1] Axis Speaker Coverage Calculaation