Photo & Video

Photo & Video Calculators

Calculate depth of field, focal length, file sizes, aspect ratios, and exposure math.

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12 tools

Depth of Field Calculator

Depth of field calculator: estimate near and far focus limits from focal length, aperture, subject distance, and circle of confusion.

Exposure value calculator: EV from aperture, shutter speed, and ISO.

Flash guide number calculator: solve guide number, aperture, or distance for flash photography.

Focal length calculator: estimate focal length from sensor width, subject distance, and field-of-view width.

Frame rate duration calculator: convert frames to seconds, minutes, or timecode at any frames-per-second rate.

Image file size calculator: uncompressed size from pixel dimensions, bit depth, and color mode.

Lighting ratio calculator: convert main-to-fill stops to a lighting ratio and light falloff.

Macro magnification calculator: reproduction ratio from extension tube and lens focal length.

Print size calculator: compute print dimensions and PPI from pixel dimensions and physical print size.

Shutter speed stops calculator: find how many exposure stops (EV) differ between two shutter speeds.

Timelapse calculator: frames and finished clip length from capture interval and duration.

Video file size calculator: estimate file size from bitrate, resolution, frame rate, and duration.