Photography
calculators & references
Free tools built for real shooting situations — from depth of field on a portrait session to reciprocity failure on a long film exposure. All free, no signup required.
Enter aperture, focal length, and subject distance to get exact near/far DOF limits and hyperfocal distance.
Open calculatorInput your base exposure and ND stop value — get the corrected long exposure shutter speed instantly.
Open calculatorCorrect exposure settings for any outdoor lighting condition. Essential for film shooters without a meter.
Open calculatorFind the minimum safe handheld shutter speed for your focal length and sensor size to avoid camera shake.
Open calculatorFind out the maximum print size your camera’s megapixels can handle at 300, 150, and 72 dpi.
Open calculatorSee the full-frame equivalent of any focal length on APS-C, Micro Four Thirds, or medium format sensors.
Open calculatorCorrected long exposure times for Portra 400, HP5, Velvia 50, Delta 100, Acros, and 10 more film stocks.
Open calculatorIf I push 2 stops, what do I meter at? Covers common film stocks with notes on grain and contrast changes.
Open calculatorFilm stock + developer + dilution + temperature = development time. Covers D-76, Rodinal, HC-110 and more.
Open calculatorCalculate dodge and burn times for enlarger printing using f-stop increments.
Coming soonGenerate a printable hyperfocal distance reference card for your camera and lens combination.
Coming soonGuide number + aperture = distance. Or work backwards from distance to find the power needed.
Coming soonMissing a tool
you need?
Suggest one and I’ll consider building it.