EV Difference Calculator

Use this page to calculate the exposure difference in stops/EVs between two images by inputting the shutter speed, aperture, ISO and ND filter reduction (if any).

• Shutter Speed is in seconds, and supports fractions. E.g.

  1/4000

  for 1/4000th of a second, or

  30

  for 30 seconds.
• Aperture should be without the "F/". E.g.

  8

  for F/8, or

  2.2

  for F/2.2.
• ISO is as you'd expect. If left blank, will default to

  100

  .
• In the Filter box, type the number of EVs/stops that your filter darkens an image. E.g. for a 3-stop filter (AKA "ND8") type

  3

  , or a 12-stop filter (AKA "ND4096") type

  12

  . If no filter was used, leave it blank or type

  0

  .