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ND Filter Calculator
Enter your shutter speed without an ND filter, then choose a filter strength by multiplier, stops, or stacked pieces. Built for long exposure and video-style planning; results describe exposure ratios only—verify in the field with your histogram and camera limits.
Base shutter (no ND)When filled, overrides the dropdown above; leave empty to use the preset.
ND setup
Quick presets
Equivalent shutter
1/2 s
Exact0.512 s
Total multiplier / Total stops
×646 stops
How to use
Start from the shutter you’d use without an ND. Multiplier N means light is cut to 1/N; each stop halves the light, so N = 2^stops. Stacked NDs multiply in transmission (or add in stops). This tool does not replace your meter—treat long results as a planning guide.