ND Filter Exposure Calculator
Enter your base shutter speed and ND stops to get the new exposure.
Result
How to use
- Enter your values in the fields above.
- Press Calculate to see your result instantly.
- Use the Share button to copy a link to your result.
About this calculator
Each stop of neutral-density filtration halves the light reaching the sensor, so the corrected shutter speed is new shutter speed = base shutter speed × 2^stops — a 6-stop ND (like an ND64) turns a 1/125s exposure into a 32-second one, since 2^6 = 64.
Landscape and long-exposure photographers use ND filters to smooth moving water or clouds, or to allow a wide aperture in bright daylight, and this calculator lets them work out the new shutter speed before shooting rather than guessing and checking on the camera's built-in meter, which many ND filters are too dark for the meter to read directly.
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