ND Filter Calculator
Enter a base shutter speed and the filter strength in stops to calculate the adjusted exposure time.
New time = base time × 2^stops.
A QUICK WALKTHROUGH
How to use this tool
- Enter the base shutter speed in seconds.
- Enter the ND filter strength in stops.
- Read the adjusted exposure time.
Formula
New time = base time × 2^stops. The filter strength field is interpreted as exposure stops, as specified by the source tool.
Local calculation
The calculation runs in your browser and does not send your inputs to a server.
GOOD TO KNOW
Common questions
What does the strength value mean?
Enter the ND filter strength as the number of exposure stops. This calculator does not reinterpret a density label as stops.
Is my data uploaded?
No. The calculation runs locally in your browser.