Use this cinematography or projection calculation to plan image geometry, exposure, timing, storage, film footage, or presentation from explicitly stated camera and display parameters.

Frame Count (frames)

Required integer input.

Edit Rate Frames Per Second (fps)

Required number input.

Composition playlist timeline duration from frame count and edit rate, excluding any external pre-show content. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Duration Seconds (s)

The resulting duration seconds returned as a number.

• Real results depend on lens design, sensor or film dimensions, focus criteria, transmission, exposure calibration, codec settings, color pipeline, projector setup, screen, viewing environment, and manufacturer conventions. Nominal specifications and simplified formulas may not match measured performance.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Confirm critical values with the actual camera, lens, codec, projector, and delivery specification, then run a camera or projection test under representative conditions.

• Frame Rate To Shutter Speed

  180-degree shutter convention: exposure duration is half a frame period, 1/(2·fps).

• Shutter Angle To Shutter Speed

  Exposure duration from rotary shutter angle and frame rate: t=angle/(360·fps); valid for a 0–360° shutter.

• Shutter Speed To Shutter Angle

  Rotary shutter angle from exposure duration and frame rate: angle=360·fps·t; rejects exposure longer than a frame.