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

Reel Fill Fraction

Required number input.

Metric length of film loaded onto a nominal 2,000-foot reel at the supplied fill fraction; full reel is 609.6 m. 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]

Length Meters (m)

The resulting length meters returned as a number.

• Film footage and runtime conversions depend on gauge, perforation format, frames per foot, frame rate, leader, tails, splices, reel capacity, and scanning convention. Actual usable footage and archive condition require inspection.
• 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.

• Reel Runtime 2000 ft

  Runtime of a nominal 2,000-foot reel from gauge-dependent frames per foot and projection frame rate.

• 35mm Equivalent Focal Length

  35 mm full-frame-equivalent focal length using the 36×24 mm diagonal divided by the camera sensor diagonal.

• Chroma Subsampling Bandwidth

  Uncompressed decimal MB/s for YCbCr with one luma sample and two chroma channels at a supplied per-channel chroma sample fraction (0.25 for 4:2:0, 0.5 for 4:2:2).