Depth of Field Calculator - Calculator Academy

Enter the distance to an object, the f-number, the circle of confusion, and the focal length into the calculator to determine the depth of field.

Depth of Field Formula

The following formula is used to calculate the depth of field.

DOF = 2*u*N*c/f^2

To calculate the depth of field, multiply 2 by the distance, f-number, and circle of confusion, then divide by the focal length squared.

A depth of field is defined as the distance between the nearest and furthest distances that are the acceptably sharp focus in an image.

How to calculate a depth of field?

First, determine the distance of the subject.
Measure the distance of the subject.
Next, determine the f-number.
Calculate the f-number of the lens.
Next, determine the circle of confusion.
Calculate the total circle of confusion.
Next, determine the focal length.
Measure or calculate the focal length.
Finally, calculate the depth of field.
Calculate the depth of field using the equation above.

What is a depth of field?

A depth of field is a measure of distance between the nearest and furthest objects that are acceptably sharp in an image.