Free tool
Print Exposure Calculator
f-stop printing arithmetic, test strips and dry-down compensation.
Inputs
New exposure time
11.2s
at f/8 · RC grade 2 · filter 1
Before dry-down—
Multiplier—
Stop change—
Dry-down—
Filter advice—
Five-step test strip
—0–60 s
f-stop table
What this calculator does
Change one print by a third of a stop and every other print changes with it. This calculator converts between exposure time and f-stop increments, generates a five-step test strip, and applies dry-down compensation for fibre paper.
Inputs
- Current exposure time
- Aperture
- Paper type
- Adjustment in stops
- Contrast filter
Outputs
- New exposure time
- Multiplier and stop change
- Five-step test strip times
- f-stop table
- Dry-down note and filter advice
Educational estimates. This calculator uses published approximations and standard photographic relationships. It is a teaching aid, not a substitute for the data sheet supplied with your film, developer or paper, and it makes no claim about the result you will get. Verify every figure before you rely on it.