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Depth of field, exposure triangle, file size, frame rate. Build a shot list with confidence.
Tap any card to open its calculator page.
Calculate display aspect ratio from width and height in pixels
Calculate pixels per inch for any screen from resolution and display size
Calculate near limit, far limit, and total depth of field for a lens setup
Calculate focal length from sensor width and field of view angle
Estimate image file size from resolution, bit depth, and compression ratio
Estimate video file size from codec bitrate and duration
Estimate recommended video bitrate from resolution, frame rate, and quality
Calculate frames per second from total frame count and duration
Minimum handheld shutter speed via the reciprocal rule (1/focal length, crop-adjusted)
Calculate Exposure Value (EV) from ISO, aperture, and shutter speed
Calculate golden ratio dimensions for photography composition
Calculate distance from subject to nearest rule-of-thirds line
Calculate total frames and required shooting duration for a time-lapse
Calculate physical print dimensions from pixel resolution and DPI
Look up crop factor and FOV multiplier for common camera sensor formats
Calculate megapixels and maximum print size at 300 DPI from resolution
Calculate 35mm equivalent focal length and angle of view from crop factor
Calculate entrance pupil diameter and aperture area from f-stop and focal length
Calculate the hyperfocal distance for maximum depth of field
Calculate light intensity falloff ratio between two distances (inverse square law)
Convert between Kelvin and Mireds color temperature values
SNR gain (stops + dB) from averaging N frames using the √N noise-reduction rule
Estimate freelance editing time and cost from photo count and per-photo rate
Simulate ND filter exposure stops and calculate required shutter speed
Compare two lenses side-by-side for focal length and aperture
Estimate total Lightroom batch-edit time from photo count and presets per photo
Compare pixel density (px/mm²) between two camera sensors — proxy for per-pixel noise
Optimize gallery layout and loading for best performance
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