[{"data":1,"prerenderedAt":25},["ShallowReactive",2],{"content-bandwidth-calculator-en":3},{"about":4,"steps":7,"faq":12},[5,6],"Internet connections are sold in megabits per second (Mbit\u002Fs), but file sizes are given in megabytes or gigabytes. Because a byte has eight bits, downloading 1 GB over a 100 Mbit line takes not 10 but at least 80 seconds. The bandwidth calculator does this conversion for you.","It calculates how long a transfer takes, which bandwidth you need for an amount of data in a given time – e.g. for a nightly backup – and converts data rates between bit\u002Fs and byte\u002Fs. An adjustable overhead accounts for the share of the rate used by protocols and Wi-Fi. Convert storage sizes in other units with the [[unit-converter]].",[8,9,10,11],"Choose whether you need the download time, the required bandwidth or a conversion.","Enter the data size and speed or the available time with matching units.","For the download time, set the expected overhead, e.g. 10 % for Wi-Fi.","Read the result and copy it if needed.",[13,16,19,22],{"q":14,"a":15},"What is the difference between Mbit\u002Fs and MB\u002Fs?","Mbit\u002Fs means megabits, MB\u002Fs megabytes per second. A byte has 8 bits, so 100 Mbit\u002Fs equals 12.5 MB\u002Fs. Download programs usually show MB\u002Fs, providers advertise Mbit\u002Fs.",{"q":17,"a":18},"Why does my download take longer than calculated?","The advertised speed is a maximum. Protocol overhead (TCP\u002FIP, encryption), Wi-Fi interference, other devices on the network and the speed of the server reduce the actual rate. An overhead of 10–20 % is normal.",{"q":20,"a":21},"What do KiB, MiB and GiB mean?","These are binary prefixes: 1 KiB = 1024 bytes, 1 MiB = 1024 KiB. Disk vendors, by contrast, count in steps of 1000. That is why Windows shows a 1 TB disk as about 931 “GB” – meaning GiB.",{"q":23,"a":24},"How much bandwidth do I need for video streaming?","As a rule of thumb: about 5 Mbit\u002Fs for HD, 15–25 Mbit\u002Fs for 4K per stream. With the “Required bandwidth” mode you can also work out which connection you need for a backup or a large upload in a given time.",1792173704954]