Film footage
calculator.
Convert feet of 16mm, 35mm, 65mm or Super 8 film to running time — or work back from a running time to the footage you need. Any frame rate, every common gauge.
Frames per foot come from the perforation pitch of each gauge. Real magazines carry a little leader, so treat results as running time on the film itself.
How long does a roll last?
Frames per foot, feet per minute, and the running time of a common roll — all at 24 fps.
| Format | Frames / ft | Feet / min | Common roll | Runs |
|---|---|---|---|---|
| 35mm 4-perf | 16 | 90 | 1000 ft | 11:07 |
| 35mm 4-perf | 16 | 90 | 400 ft | 4:27 |
| 35mm 3-perf | 21.33 | 67.5 | 1000 ft | 14:49 |
| 35mm 2-perf | 32 | 45 | 1000 ft | 22:13 |
| 16mm / Super 16 | 40 | 36 | 400 ft | 11:07 |
| 16mm / Super 16 | 40 | 36 | 100 ft | 2:47 |
| 65mm 5-perf | 12.8 | 112.5 | 1000 ft | 8:53 |
| Super 8 | 72 | 20 | 50 ft cartridge | 2:30 |
Keep the camera math on set.
Set Math bundles card runtime, exposure and more calculators, free. DOPro puts them under a real director's viewfinder. Also try the shutter angle calculator.
Film footage, answered.
How many feet of film is one minute?
It depends on the format and frame rate. At 24 fps, 35mm 4-perf runs 90 feet per minute, 16mm runs 36, 35mm 3-perf runs 67.5, 35mm 2-perf runs 45, and 65mm 5-perf runs 112.5.
How long does a 400 ft roll of 16mm film last?
A 400 ft roll of 16mm holds 16,000 frames (40 per foot), which is about 11 minutes 7 seconds at 24 fps.
How long does a 1000 ft roll of 35mm film last?
A 1000 ft roll of 35mm 4-perf holds 16,000 frames (16 per foot), about 11 minutes 7 seconds at 24 fps. A 400 ft load lasts about 4 minutes 27 seconds.
How do you convert film feet to running time?
Multiply the feet by the frames per foot, then divide by the frame rate to get seconds.
400 ft of 16mm at 24 fps is 400 × 40 / 24 = 666.7 s, or 11:07.
How many frames are in a foot of film?
16mm has 40. 35mm 4-perf has 16, 3-perf about 21.33, 2-perf 32, 65mm 5-perf 12.8, and Super 8 has 72 frames per foot.