Film ToolsDeveloper Chart
Enter the dilution ratio (e.g. 1 + 9 + 0 for a 1:9 dilution) and the total volume you want to make. The calculator will tell you how much of each part to measure out.
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e.g. Developer + Water + Additive. Set unused parts to 0.

Volumes are rounded to one decimal place. For critical work, measure each component separately with a graduated cylinder.
This calculator takes a standard developing time and adjusts it for temperature. Enter the recommended developing time and temperature, then the actual temperature you want to use. Use decimal format, set the unit correctly, and press Submit.
You can also estimate continuous agitation changes for motorized processing workflows. If constant agitation is enabled, the time is reduced by 15%.
Please note: these conversions are approximate and are based on standard black and white film in normal developer. Film and developer combinations vary, so always test before important work.
This calculator idea is credited to Matthew Roughan.
Multiply the published time at recommended ASA by the factor for your push amount. Example: Tri-X at 400 ASA (6 min) pushed 3 stops → 6 × 4.5 = 27 min.
Developer1 Stop2 Stops3 Stops
Standard×1.5×2.25×4.5
Compensating×1.4×1.85×2.5
TMax×1×1.33×1.66
Compensating developers include Microphen, TMax developer, and others specifically formulated for push processing. Use as starting points only — times may prove excessive.
Configure your complete film processing sequence. When a stage finishes, the timer will wait for you to physically pour out the chemical before starting the next stage.

1. Developer

Development time and agitation schedule.

Set to 0 to skip initial agitation.

2. Stop Bath

Stop the development process.

3. Fixer

Fix the film before washing.

Set to 0 to skip initial agitation.

4. Wash

Final washing stage.

Processing Summary

Total wall-clock processing time

Developer10:00
Stop Bath00:30
Fixer04:00
Wash05:00
Total19:30