Photography calculators
that show their working.
Choose a practical question. Every tool runs in your browser, requires no account and keeps your inputs on your device.
Video Storage & Record Time Calculator
Turn card capacity and camera bitrate into a realistic recording-time estimate, with a safety allowance and SD speed-class check.
time = usable card bits ÷ bitrateSlow-Motion Duration Calculator
See how long a high-frame-rate clip becomes on a 24, 25 or 30 fps timeline and how slow the resulting playback will be.
playback = capture time × capture fps ÷ timeline fpsCrop Factor & Equivalent Lens Calculator
Compare framing across full frame, APS-C, Micro Four Thirds and smaller sensors without confusing exposure with depth of field.
equivalent focal length = focal length × crop factorDepth of Field & Hyperfocal Calculator
Estimate near limit, far limit, total depth of field and hyperfocal distance for practical shooting decisions.
H = f² ÷ (N × c) + fField of View Calculator
Calculate horizontal and vertical angle of view plus the width and height covered at your chosen subject distance.
angle = 2 × atan(sensor dimension ÷ 2f)ND Filter Exposure Calculator
Convert a metered shutter speed into the corrected exposure for any neutral-density filter from one to sixteen stops.
filtered shutter = base shutter × 2ˢᵗᵒᵖˢTimelapse Planner
Plan interval, frame count, finished duration and approximate storage before leaving the camera to run.
frames = shooting time ÷ intervalMacro Field & Reproduction Calculator
Translate magnification into real-world subject coverage and estimate pixels per millimetre for digitisation or close-up work.
subject field = sensor dimension ÷ magnification