Photo & Video
Photo & Video Calculators
Calculate depth of field, focal length, file sizes, aspect ratios, and exposure math.
12 tools
Depth of Field Calculator
Depth of field calculator: compute near limit, far limit, and hyperfocal distance from focal length, aperture, and subject distance. Editable lens data, free.
Exposure Value Calculator
Exposure value calculator: combine aperture, shutter speed, and ISO into EV stops and find equivalent exposure settings for any light. Free, no signup.
Flash Guide Number Calculator
Flash guide number calculator: find the right aperture or flash power from guide number and distance for correct exposure. Free, private, runs in your browser.
Focal Length Calculator
Focal length calculator: compute lens focal length from object and image distances for cameras and optics. Free, editable units, runs locally in your browser.
Frame Rate Duration Calculator
Frame rate calculator: convert between frames, frame rate, and clip duration for 24, 30, 60, and 120 fps video footage. Free, runs locally, no signup.
Image File Size Calculator
Image file size calculator: estimate storage requirements from pixel dimensions, bit depth, and compression ratio before you export or upload. Free, no signup.
Lighting Ratio Calculator
Lighting ratio calculator: convert key and fill light readings into a lighting ratio and see the contrast look it produces. Free, private, runs locally.
Macro Magnification Calculator
Macro magnification calculator: work out magnification ratio and working distance from lens, extension tube, and sensor specs. Free, private, no signup.
Print Size Calculator
Print size calculator: convert image pixels to print dimensions at any DPI and check resolution before you order prints. Free, runs locally in your browser.
Shutter Speed Stops Calculator
Shutter speed stops calculator: convert any shutter speed into full, half, and third stops to nail exposure math for long exposures. Free, runs in browser.
Timelapse Calculator
Timelapse calculator: convert shoot interval, clip length and frame rate into total capture time and final video length. Free, runs locally, no signup.
Video File Size Calculator
Video file size calculator: estimate video storage from bitrate, resolution, and duration before you export. Free, editable rates, runs locally in your browser.