ND Filter Shutter Calculator
Calculate shutter duration after adding a neutral-density filter.
Your inputs
Calculation results
Formula & assumptions
New shutter = original shutter × 2^stops; assumes unchanged aperture and ISO.
Values use the specified units. Calculations use floating-point arithmetic. Check input measurements and formula assumptions before applying the result.
Compare your scenarios
Save up to five results to compare changes side by side. Scenarios stay in this tab until you clear or reload it.
Using ND Filter Shutter Calculator
Calculate shutter duration after adding a neutral-density filter.
- Enter original shutter, filter strength using the units printed under each field.
- Choose Calculate, or enable live updates. Review the result labels and formula assumptions.
- Save scenarios to compare up to five variations, then copy the report or download JSON or CSV.
Example
Original shutter: 0.008 seconds Filter strength: 6 stops New shutter · seconds: 0.512 New shutter · minutes: 0.0085333333 Exposure multiplier: 64
Questions & answers
What does ND Filter Shutter Calculator calculate?
Calculate shutter duration after adding a neutral-density filter.
Which units should I enter?
Original shutter uses seconds. Filter strength uses stops. Convert values to these units before calculating.
Which formula does it use?
New shutter = original shutter × 2^stops; assumes unchanged aperture and ISO.
What does the included example show?
Original shutter: 0.008 seconds; Filter strength: 6 stops. Result: New shutter · seconds = 0.512; New shutter · minutes = 0.0085333333; Exposure multiplier = 64.
Can I compare different settings?
Yes. Save a scenario, change the inputs and save another result. Up to five scenarios are compared in this tab; they disappear when you reload or leave.
Can I export the calculation?
Copy the JSON report or download JSON and CSV with inputs, result labels and numeric values. Processing uses local JavaScript; no calculation request is sent to our server. Displayed values use up to 10 significant digits; exports retain JavaScript numeric precision.
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