MovieCal is a simple calculator/converter for film and video length with many options. It converts timecodes (24,25,30fps), lengths (feet, meters) and framecounts and calculates size and volume of data. MovieCal is freeware and available for Windows,MAC, and Linux, it contains four calculators/converters: film and video length converter; film and video length calculator; file size/dpi calculator; volume of data calculation.
Note: unfortunately the entire website is in German but there is a 6.5 Mb PDF "ReadMe" download file in German & English that should provide all the info necessary! Both CNet's Download.com and Softpedia rate it as freeware plus Softpedia says the file is clean LINK