34 Free Tools
Calculators & Reference
Practical utilities for film photography — organised by what you're trying to do. No signup required.
Before You Shoot
Planning and preparation
In the Field
Exposure and focus calculations
Sunny 16 Rule
Daylight exposure without a meter
Depth of Field
Calculate focus range for any lens and aperture
Hyperfocal Distance
Find optimal focus for maximum sharpness
ND Filter Calculator
Exposure adjustments for neutral density filters
Filter Factors
Exposure compensation for coloured filters
Flash Guide Number
Calculate flash power and distance
Bellows Factor
Exposure compensation for macro and close-ups
Lens Coverage
Check if a large format lens covers your film format
Night & Astro
Long exposure and astrophotography
In the Darkroom
Film processing and printing
Development Times
Find times for any film and developer combination
Push/Pull Guide
Adjusted development times for pushed and pulled film
Dilution Calculator
Calculate developer and water volumes
Chemistry Mixing Calculator
Mix stock solutions from powder concentrates
Zone System
Tonal control and exposure placement
Paper Grade Calculator
Match paper grade to your negative density range
Print Exposure Calculator
F-stop printing, enlarger height compensation, and test strips
Scanning & Digitising
Getting your images digital
Alt Process & Printing
Calibration and alternative processes
Learning & Reference
Fundamentals and conversions