Bokeh Disc Size Calculator

Calculate the size of out-of-focus highlight discs (bokeh balls) in your images.

Linear measurement.
mm
Enter aperture (f/) value.
f-stop
Enter subject distance value.
meters
Enter background distance value.
meters

Results

Bokeh Disc Diameter:
Calculated bokeh disc diameter value.
-mm on sensor
Blur Circle:
Calculated blur circle value.
-pixels (24MP FF)
Background Blur Quality:
Calculated background blur quality value.
-description
Reference: Industry Standards.