(BS) CR and CHS calculators [AF17]

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A rudimentary but handy tool for calculating the compression ratio or post-compression size of a file and the number of cylinders, heads, and sectors on single-sided data storage disks.

It can be useful for determining the geometry of virtual hard disk images for Bochs, PCem and DOSBox and estimating possible space savings on drives compressed with DriveSpace.

𝐹𝑙𝑜𝑤 𝑏𝑦 𝐵𝑟𝑒𝑛𝑑𝑎𝑛 𝑆𝑖𝑙𝑣𝑎
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𝘛𝘩𝘦 𝘦𝘢𝘴𝘪𝘦𝘴𝘵 𝘸𝘢𝘺 𝘵𝘰 𝘮𝘦𝘢𝘴𝘶𝘳𝘦 𝘵𝘩𝘦 𝘦𝘧𝘧𝘦𝘤𝘵 𝘰𝘧 𝘢 𝘤𝘰𝘮𝘱𝘳𝘦𝘴𝘴𝘪𝘰𝘯 𝘪𝘴 𝘵𝘰 𝘶𝘴𝘦 𝘵𝘩𝘦 𝘤𝘰𝘮𝘱𝘳𝘦𝘴𝘴𝘪𝘰𝘯 𝘳𝘢𝘵𝘪𝘰. 𝘛𝘩𝘦 𝘢𝘪𝘮 𝘪𝘴 𝘵𝘰 𝘮𝘦𝘢𝘴𝘶𝘳𝘦 𝘵𝘩𝘦 𝘦𝘧𝘧𝘦𝘤𝘵 𝘰𝘧 𝘢 𝘤𝘰𝘮𝘱𝘳𝘦𝘴𝘴𝘪𝘰𝘯 𝘣𝘺 𝘵𝘩𝘦 𝘴𝘩𝘳𝘪𝘯𝘬𝘢𝘨𝘦 𝘰𝘧 𝘵𝘩𝘦 𝘴𝘪𝘻𝘦 𝘰𝘧 𝘵𝘩𝘦 𝘴𝘰𝘶𝘳𝘤𝘦 𝘪𝘯 𝘤𝘰𝘮𝘱𝘢𝘳𝘪𝘴𝘰𝘯 𝘸𝘪𝘵𝘩 𝘵𝘩𝘦 𝘴𝘪𝘻𝘦 𝘰𝘧 𝘵𝘩𝘦 𝘤𝘰𝘮𝘱𝘳𝘦𝘴𝘴𝘦𝘥 𝘷𝘦𝘳𝘴𝘪𝘰𝘯. 𝘛𝘩𝘦𝘳𝘦 𝘢𝘳𝘦 𝘴𝘦𝘷𝘦𝘳𝘢𝘭 𝘸𝘢𝘺𝘴 𝘰𝘧 𝘮𝘦𝘢𝘴𝘶𝘳𝘪𝘯𝘨 𝘵𝘩𝘦 𝘤𝘰𝘮𝘱𝘳𝘦𝘴𝘴𝘪𝘰𝘯 𝘦𝘧𝘧𝘦𝘤𝘵.

𝘊𝘰𝘮𝘱𝘳𝘦𝘴𝘴𝘪𝘰𝘯 𝘳𝘢𝘵𝘪𝘰. 𝘛𝘩𝘪𝘴 𝘪𝘴 𝘴𝘪𝘮𝘱𝘭𝘺 𝘵𝘩𝘦 𝘳𝘢𝘵𝘪𝘰 𝘰𝘧 𝙨𝙞𝙯𝙚_𝙖𝙛𝙩𝙚𝙧_𝙘𝙤𝙢𝙥𝙧𝙚𝙨𝙨𝙞𝙤𝙣 𝘵𝘰 𝙨𝙞𝙯𝙚_𝙗𝙚𝙛𝙤𝙧𝙚_𝙘𝙤𝙢𝙥𝙧𝙚𝙨𝙨𝙞𝙤𝙣 𝘰𝘳:

𝘊𝘰𝘮𝘱𝘳𝘦𝘴𝘴𝘪𝘰𝘯_𝘳𝘢𝘵𝘪𝘰 = 𝘴𝘪𝘻𝘦_𝘢𝘧𝘵𝘦𝘳_𝘤𝘰𝘮𝘱𝘳𝘦𝘴𝘴𝘪𝘰𝘯 ÷ 𝘴𝘪𝘻𝘦_𝘣𝘦𝘧𝘰𝘳𝘦_𝘤𝘰𝘮𝘱𝘳𝘦𝘴𝘴𝘪𝘰𝘯

https://www.london.ac.uk/sites/default/files/study-guides/data-compression.pdf

https://en.m.wikipedia.org/wiki/Data_compression_ratio

https://www.calculatorultra.com/en/tool/file-compression-calculator.html

http://www.csgnetwork.com/datacompressioncalc.html

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