How Long's that Clip?

I'm having to work out how long each one of my super 8 shots it so I can do an offline edit with my digital material. I could only find imperial converters, so I did some calculations and came up with the metric figures.

2.36 frames / centimetre. This allowed me to throw together a little spreadsheet to work out how long each clip is based on its length.

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If you don't have Excel, all you need to know is (2.36 x [length in cm]) x [fps]. Enjoy!