Enter the focal length, aperture diameter, and the f-number into the calculator to determine the aperture area.

Aperture Area Formula

The following formula is used to calculate the aperture area.

A = π (D / 2)^2 = π (n/ (2 * f))^2,

  • Where D is the aperture diameter (mm)
  • n is the focal length (mm)
  • f is the f-number,
  • A is the aperture area (mm^2)

Aperture Area Definition

An aperture is a hole, and as a result, the aperture area is simply a measure of the area of that hole. It’s a characteristic that affects how much light can pass through an object. For the human eye, this aperture is the pupil, which can expand or contract depending on how much light is needed to see.

How to calculate aperture area?

How to calculate aperture area?

  1. First, determine the aperture diameter.

    Measure the diameter of the aperture.

  2. Determine the focal length.

    Measure the focal length mm.

  3. Determine the f-number.

    Calculate the f-number.

  4. Finally, calculate aperture area.

    Calculate the aperture area using the formula above.


What is an aperture area?

An aperture area is the total area that light can pass through in a lens.