Shift a shutter speed by stops to find the next slower or faster setting.
Each stop halves or doubles the exposure time, so multiplying the current time by a power of two moves through the shutter series. Swapping stops between shutter and aperture or ISO keeps exposure balanced, and the right speed decides motion blur versus freeze.
Shutter Speed Adjust
New time = (1 / shutter) x 2^stops; speed shown as 1/X
New time = (1 / shutter) x 2^stops; speed shown as 1/X Each stop halves or doubles the exposure time, so multiplying the current time by a power of two moves through the shutter series.
Swapping stops between shutter and aperture or ISO keeps exposure balanced, and the right speed decides motion blur versus freeze.
This calculator takes 2 inputs: Current (1/X), Change. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.