Exposure value calculator
Exposure value (EV) sums up your aperture, shutter speed and ISO into one number describing how much light reaches the sensor. Enter all three and this tool returns the EV at your ISO plus the EV100 value referenced to ISO 100, so you can compare scene brightness consistently.
It uses EV = log₂(N² / t) with the ISO correction EV₁₀₀ = EV − log₂(ISO / 100) — computed entirely in your browser.