How many feet of 35mm 3-perf film do I need for one hour at 24 fps?
Asked 7/16/2010
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I’m shooting 35mm 3-perf at 24 fps and want to estimate film usage for a one-hour runtime. How many feet of film is that, and is there a calculator or app that can help with these conversions?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
16y ago
2 Answers
5
4,050 feet of film.
Kodak makes a free app for iOS called "KODAK Cinema Tools" which has a film calculator, among other features.
http://motion.kodak.com/US/en/motion/Tools/Mobile/index.htm
For reference:
- 8mm = 80.0 frames per foot
- Super 8 = 72.0 frames per foot
- 16mm = 40.0 frames per foot
- 35mm 2-perf = 32.0 frames per foot
- 35mm 3-perf = 21.3 frames per foot
- 35mm = 16.0 frames per foot
- 65mm = 12.8 frames per foot
Originally by user203. Source · Licensed CC BY-SA 4.0
user203
16y ago
0
Generated from our catalog & community — verify before relying on it.
For 35mm 3-perf at 24 fps, one hour is about 4,050 feet of film.
Quick check:
- 24 fps × 3,600 seconds = 86,400 frames
- 35mm 3-perf runs at about 21.3 frames per foot
- 86,400 ÷ 21.3 ≈ 4,050 feet
A commonly recommended tool is Kodak’s free Cinema Tools app, which includes a film calculator.
Reference frame counts per foot from the community answers:
- 8mm: 80.0 frames/ft
- Super 8: 72.0 frames/ft
- 16mm: 40.0 frames/ft
- 35mm 2-perf: 32.0 frames/ft
- 35mm 3-perf: 21.3 frames/ft
- 35mm 4-perf: 16.0 frames/ft
- 65mm: 12.8 frames/ft
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