I-Bandwidth / Isikhathi Sokukhishwa Sesikhathi Soku kalkuli
Linganisa isikhathi sokulayisha phezulu kusuka kubukhulu behele kanye nejubane lokuxhuma, nge-throughput conversions.
Iziphetho zivuselelwa uma ubhala.
Malunga nale khadi
A bandwidth calculator works out how long a file takes to transfer over a connection of a given speed, and the key to getting it right is the bits-versus-bytes distinction. File sizes are quoted in bytes — KB, MB, GB, TB — while connection speeds are quoted in bits per second — Kbps, Mbps, Gbps — and a byte is 8 bits. So the download time is the file size converted to bits (× 8), divided by the effective bit rate of the link. That single factor of 8 is why a connection’s headline number never matches the download figure you watch tick by.
As a worked example, a 1 GB file over a 100 Mbps connection is 1 GB × 8 = 8,000 megabits, and 8,000 / 100 = 80 seconds at the theoretical maximum — because 100 Mbps is only about 12.5 MB per second. Add a protocol-overhead allowance for the real world (TCP/IP headers, retransmissions, shared links) and the time stretches accordingly; a 10% overhead pushes that 80 s to about 89 s. The calculator also lists the speed expressed in bps, Kbps, Mbps, Gbps and MB/s for quick cross-checks.
You can switch between decimal units (1 KB = 1,000 bytes, the convention ISPs and drive makers use) and binary units (1 KiB = 1,024 bytes, how operating systems count), which shifts the numbers by a few percent — a "1 TB" decimal drive is about 931 binary GiB. This makes the tool handy for estimating backups and large downloads, sizing an internet plan, planning video streaming or uploads, and sanity-checking why a transfer is taking as long as it is.
Imibuzo ebuzwa kaningi
Kungani isivinini sami sokulayisha sihamba kancane kunesikhathi sokuxhumana?
Izinga libhalwe nge-megabits ngehora kodwa amafayela alinganiselwa nge-megabytes — i-byte i-8 bits, ngakho-ke i-100 Mbps ihamba nge-12.5 MB ngehora. I-protocol overhead, bandwidth ehlukanisiwe kanye nemikhawulo yeseva ikhuphula okuningi, okuzoholela ezindaweni ze-overhead.
Yini ushintsho phakathi kwesayizi yeshumi neye-binary?
Amayunithi weshumi (asetshenziswa yi-ISPs nabenzi be-drive) abheka i-1 KB njenge-1000 bytes; amayunithi we-binary abheka i-1 KiB njenge-1024 bytes. I-"1 TB" i-decimal drive ilingana ne-931 binary GiB, ngakho-ke isinqumo sishintsha isikhathi sokudlulisa kancane.
Ngiguqula kanjani i-Mbps ibe yi-MB/s?
Yabelana nge 8: 100 Mbps ÷ 8 = 12.5 MB/s. I-calculator ikwenza lokhu ngokuzenzakalela futhi ikhombisa isikhathi esitholakele ngezinsuku, amahora, imizuzwana namasekondi.
Yini okufanele ngiyimisele imithetho yokuziphatha ephathelene ne-overhead?
Ukudluliswa okungokoqobo kulahlekelwa yingxenye ye TCP/IP headers, handshakes kanye nokudluliswa kabusha. 5-10% kuyinto efanelekayo yokudlulisa okunentambo; sebenzisa okuningi ku-Wi-Fi, iselula noma ukuxhumana okugcwalisiwe. Kususa isivinini esisebenzayo futhi kudlulisa ukulinganiselwa.
Kungani i-1 GB ingaba nenani elifanayo le-bytes?
Under the decimal convention 1 GB is 1,000,000,000 bytes, but operating systems often count in binary where 1 GiB is 1,073,741,824 bytes. Switch the byte-convention option to match how your file size was measured for an accurate transfer time.
Ingabe kuthatha isikhathi esingakanani ukulayisha phezulu ifayela elikhulu kuxhumano lwami?
Ngeza ubukhulu befayela kanye nejubane lezinhlelo zakho bese ufunda isikhathi. Umzekelo, umdlalo we-25 GB ngaphezulu kwe-100 Mbps uthatha imizuzu engu-33 engcono kakhulu, ngaphambi kokuqala — ithuluzi lihlukanisa imiphumela ibe yizinyanga, amahora, amaminithi namasekondi.
Ingabe lokhu kulinganisela isivinini sami se-internet?
Hayi - ilinganisela isikhathi sokudlulisa kusuka kukhawulo owenzayo, ayihlola intambo yakho. Sebenzisa ukuhlolwa okuhlukile kwekhawulo ukuthola ukudluliswa kwakho okungokoqobo, bese ufaka lo mfanekiso lapha ukuze ulinganise isikhathi sokufinyelela.
API — sebenzisa le calculator kusuka kukhodi
Nquma le calculator njenge JSON evulekile yendawo yokuqeda - akukho isithonjana esidingekayo. Thumela amaxabiso endawo ngezansi njengezilungiselelo zombuzo noma i-JSON. Noma yini ongayishiya isebenzisa iphutha elifanayo elifakwe ngaphambili lekhasi; ipharamitha engaziwa yi-400, ayikho i-zero emnyama. Funda i-API egcwele →
Ingxenye yendawo
GET https://calculator.free/api/v1/bandwidth/curl
curl "https://calculator.free/api/v1/bandwidth/?size=1&size_unit=GB&speed=100&speed_unit=Mbps"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/bandwidth/?" + new URLSearchParams({
"size": "1",
"size_unit": "GB",
"speed": "100",
"speed_unit": "Mbps"
}));
const data = await r.json();
console.log(data.results);Izibalo ziyisilinganiso esisetshenziswa ukuqondisa kuphela, hhayi ukucebisa ngezimali, ukwelashwa noma ukukhokha.