The film footage calculated on the order form is just an estimate based on the reel diameter. We will measure the exact footage and adjust the total appropriately. We do not charge for blank or black film. All film is returned.
 

		Approx Run Time (hh:mm:ss)
Reel Diameter	Feet	8mm 16 fps	Super8 18 fps	16mm 16 fps
3"	50	3:30	3:00	2:20
4"	100	6:60	6:00	4:35
5"	200	14:00	12:00	9:10
6"	300	21:00	18:00	13:45
7"	400	28:00	24:00	18:20
8"	600	NA	NA	27:30
10"	800	NA	NA	36:40
12"	1200	NA	NA	55:00
14"	1600	NA	NA	1:13:20
15"	2000	NA	NA	1:31:40

Some of the 8mm Kodak yellow boxes say 25 ft on them and it can be confusing because there is actually 50 feet on these reels. Most of the boxes actually say 25ft of a double roll. Usually the words "double roll" will be right under "25ft" or might be on the other side of the box. When the film was purchased, it had one 25ft roll of 16mm film in the cartridge. You shot one side of the 25 foot roll and then took the cartridge out, turned it over, put it back in and shot the other side of 25 foot roll. Kodak then split the 25 feet of 16mm film into one 50 foot roll of 8mm film. So, this is why the 3" reels have 50 feet on them even though the box might say 25ft of a double roll.