Photography Exposure Triangle Calculator
Calculate equivalent exposure settings for ISO, aperture, and shutter speed.
Adjust one and see the others change.
Equivalent Exposure
The exposure triangle consists of three settings that control how much light reaches the camera sensor:
1. ISO — Sensor sensitivity (100, 200, 400, 800, 1600, 3200, 6400)
- Lower = less noise, needs more light
- Doubling ISO = 1 stop brighter
2. Aperture (f-stop) — Size of the lens opening (f/1.4, f/2, f/2.8, f/4, f/5.6, f/8, f/11, f/16)
- Lower f-number = wider opening = more light
- Each full stop halves/doubles light
3. Shutter Speed — How long the sensor is exposed (1/4000, 1/2000, 1/1000, 1/500, 1/250, 1/125, 1/60, 1/30)
- Slower = more light, more motion blur
- Each full stop halves/doubles light
Exposure Value (EV):
EV = log₂(f² / t) - log₂(ISO / 100)
Where f = f-number, t = shutter speed in seconds.
Changing one setting by one stop requires an equal and opposite change in another to maintain the same exposure.