Skip to content
Calculator Tools
Photography Calculators

Exposure Value Calculator

Exposure value from aperture, shutter speed and ISO, with the lighting it corresponds to.

Enter values

Results update as you type.

Result

Exposure value (EV)

11.94

EV at ISO 100
11.94
Shutter speed
1/125 s
Scene brightness
Overcast or open shade
Equivalent at f/8
1/61 s
Light value in lux (approx)
9,800
Stops from sunny 16
-3.06

About the Exposure Value Calculator

Exposure value from aperture, shutter speed and ISO, with the lighting it corresponds to.

Also known as: ev calculator, exposure calculator, light value calculator, sunny 16 calculator.

How to use this calculator

  1. Enter aperture, shutter speed (1/x second), iso.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

EV = log₂(N² / t) − log₂(ISO / 100)

Worked example

Using the values pre-filled in the calculator above:

  • Aperture = 5.6
  • Shutter speed (1/x second) = 125
  • ISO = 100

the calculator returns:

  • Exposure value (EV): 11.94
  • EV at ISO 100: 11.94
  • Shutter speed: 1/125 s
  • Scene brightness: Overcast or open shade