Donwload time calc5/1/2023 ![]() There exist various concepts of time that have been postulated by different philosophers and scientists over an extensive period of human history. Oct., Dec.-31 daysįeb.-28 days for a common year and 29 days for a leap yearĢ4 hours or 1,440 minutes or 86,400 seconds The following table shows some common units of time. However, due to how time is defined, there exist differences in how calculations must be computed when compared to decimal numbers. The actual capacity of the disk is close to 1,000,000,000,000 bytes.Like other numbers, time can be added or subtracted. For example, a 1000GB (1TB) hard disk will display in Windows as 931GB. This is why there is often a discrepancy between advertised memory / storage capacities and that reported inside Windows. Most hardware manufacturers use decimal based prefixes. Linux and Microsoft Windows however have not changed from the old convention and continue to refer to a kilobyte as 1024 bytes. Apple madd the change in 2009 with the release of its OS X Snow Leopard operating system. ![]() Of those who were not already using the standard defined by the IEC, some have switched to the standard while others haven't. Although this move was intended to remove the confusion, some say this has only generated more confusion. At the same time, they defined the kilobyte as 1000 bytes. In 1999, the International Electrotechnical Commission (IEC) decided to correct the convention used, and as such introduced the kibibyte (mebibyte, gibibyte, etc.) to represent 1024 bytes. This led to much confusion around whether a kilobyte should equal 1000 or 1024 bytes, and generally this varied among hardware manufacturers and software companies. Thus 2^10 = 1024, being the closest power of 2 to 1000. 3 would be 11, 4 is 100, and so on.Īs such, computer scientists traditionally used the base 2 approach to calculate file sizes. To use the digit 2, a computer uses the number 10. Rather, they operate in base 2 (binary - 0 and 1, represented as Off and On). Because there are only these two states, they can't understand base 10 logic. Computers are built on the concept of "Off/On". Humans usually work with numbers in base 10 (or decimal) - that is we recognise 10 digits (0 - 9). However computers work with numbers a little bit (no pun intended) differently. (when downloading from a compatible server) can assist by establishing multiple TCP connections to the serverĪlthough a Kilobyte is commonly referred to as 1024 bytes, this does not match the standard convention defined by the International System of Units (SI) - which says that 'kilo' should be 1000 (as in kilogram = 1000 grams, kilometer = 1000 meters, etc). Means that you will never download a file at the full speed available. Technical limitations of TCP/IP (the network protocols used for the internet and most computer networks).For example, if you or someone else working on the same internetĬonnection as you is downloading, this will consume the available bandwidth The speed of the server being downloaded from and the speed of its connection to the internet.ADSL2+ usuallyĭelivers a connection speed between 8Mb/s and 18Mb/s Is largely dependant on the quality and distance from the connected telephone exchange. For example, ADSL2+ is often advertised as "up to 24Mb/s" however this ![]() When downloadingĪ file, a number of factors can influence the download speed. It is important to understand that download times are entirely theoretical and represent the maximum theoretical speed achievable. You can check this using the Download Calculator Why do downloads take longer than calculated? It is often believed that, for example, an internet or network connection speed ofġ0Mb/s could theoretically download a 10MB file in 1 second - however this is inaccurate. Internet connection speeds are usually measured in Megabits per second (Mb/s) but file sizes are usually A common misunderstanding is the difference between Megabits (Mb) and Megabytes (MB).
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