Exposure Triangle Calculator

Calculate exposure value (EV) from ISO, aperture, and shutter speed. Get equivalent exposures and brightness assessments.

ISO

Aperture (f-stop)

Shutter Speed (1/x sec)

1/s

Tab to move between fields

Exposure Value (EV100)

12.94

Brightness Assessment

Shade or cloudy

EV at Current ISO12.94

Motion Blur RiskFreezes normal motion

Equivalent Exposure 1ISO 200, f/5.6, 1/500s

Equivalent Exposure 2ISO 100, f/4, 1/500s

Equivalent Exposure 3ISO 100, f/7.9, 1/125s

How to Use This Calculator

How the result changes with Aperture (f-stop)

ISO: Sensor sensitivity. Lower values produce less noise; higher values brighten the image.
Aperture (f-stop): Lens f-number. Lower values let in more light and reduce depth of field.
Shutter Speed (1/x sec): Enter the denominator of the shutter speed fraction (e.g. 250 for 1/250s).

Identify Input Parameters
ISO = 100, Aperture (f-stop) = 5.6, Shutter Speed (1/x sec) = 250 = 3 input(s) provided
Calculate Exposure Value
Exposure Value
12.94 = 12.94
Calculate Brightness Assessment
Shade or cloudy = Shade or cloudy
Calculate EV at Current ISO
EV at Current ISO
12.94 = 12.94
Calculate Motion Blur Risk
Freezes normal motion = Freezes normal motion

Engine last updated July 21, 2026. Checked against 2 independently-derived tests — how we verify calculators.

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