Calculate the time for uploading a file on a PC or Macintosh computer to avoid waiting around if its going to be a while. Predicting upload times before transferring a file allows you to multitask instead of waiting. The time for an upload depends on the size of the file as well as the upload rate of your Internet connection. Consult your Internet service provider (ISP) to obtain upload rate information for your location if you are unsure its value. Upload speeds are measured in megabytes per second. A megabyte equals 1,024 kilobytes, while a kilobyte itself is 1,024 of the base storage unit called a byte.
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Convert the file size to units of megabytes by multiplying or dividing by 1,024. If moving from from a larger unit to a smaller, divide by 1,024. On the other hand, if changing a smaller file size to a larger, one multiply by 1,024. The units in order from largest to smallest are gigabyte, megabyte, kilobyte and byte. For example, a 5.0 gigabyte movie file equals 5,120 megabytes.

Divide the file size by the upload rate, in megabytes per second, to obtain the time required for the upload in seconds. Assuming an upload rate of 2 megabytes per second, you have 5,120 megabytes divided by 2.0 megabytes per second yielding a time of 2,560 seconds.

Convert the time to minutes by dividing by 60, since each minute contains 60 seconds. Performing this step leads to 2,560 seconds divided by 60, or a time of 42.7 minutes.