Light Meter
Calculate Light Meter instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
Light Meter
log₂(B·S/100·f²/t)
EV
15EV
More about: Light Meter
What it calculates
The “Light Meter” calculator computes EV in EV from 1 parameter: log₂(b·s/100·f²/t).
Used by photographers and videographers when setting up a shoot.
Example calculation
With parameters log₂(B·S/100·f²/t) = 15 the result is 15 EV.
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.