Exposure Calculator

Your details

Choose what you want to calculate. The corresponding field below becomes the output.
The exposure value you want to achieve, used when solving for aperture, shutter, or ISO.
The f-number of your lens opening. Higher f-stop = smaller opening = less light.
f/
Exposure duration in seconds. For 1/250 enter 0.004; for 2 s enter 2.
s
Sensor or film ISO. Doubling ISO gains 1 EV stop, but also doubles noise.
Neutral density filter strength in stops. A 3-stop ND halves the light three times, requiring 8x the shutter duration.
Used to calculate the minimum hand-hold shutter speed via the reciprocal rule (1/focal length).
mm
Exposure Value (EV)Overcast or shade
13.97

Combined brightness index at ISO 100

Min Hand-Hold Shutter1/50 s
Lighting SceneSlightly overcast or hazy sun
13.97 EV
Night / Astro<0Low Light0-5Indoor5-10Daylight10-16Bright Sun16+

Your exposure value is EV 13.97.

  • EV 13.97 corresponds to "Slightly overcast or hazy sun".
  • At 50 mm the reciprocal rule suggests a minimum hand-hold shutter of 1/50 s to avoid camera shake.

Next stepUse the equivalent-exposure table in the steps panel to swap settings while preserving the same brightness.

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