ISO Equivalence
Calculate ISO Equivalence instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
ISO Equivalence
ISO 1
Shutter 1 (1/s)
ISO 2
Equiv. shutter
400
More about: ISO Equivalence
What it calculates
The “ISO Equivalence” calculator computes Equiv. shutter from 3 parameters: iso 1, shutter 1 (1/s), iso 2.
Used by photographers and videographers when setting up a shoot.
Example calculation
With parameters ISO 1 = 100, Shutter 1 (1/s) = 100, ISO 2 = 400 the result is 400 (1/400).
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.