Free tool # Upload time calculator:how long will my file take? Enter a file size and your connection speed to see a realistic upload and download time, with the overhead real networks add. Free, no signup, nothing uploaded. Updated Oct 23, 2026 File size Upload speed (Mbps) Upload speed is often much lower than download, check the upload number on a speed test. Download speed (Mbps) Upload time About 3 min 51 sec to 4 min 12 sec At 20 Mbps. Best case with no overhead: 3 min 30 sec. Download time About 46 seconds to 50 seconds At 100 Mbps. Best case with no overhead: 42 seconds. Estimate only. The range adds 10 to 20% for protocol overhead and Wi-Fi. Nothing you type leaves your browser. Free: every feature, 50 links, up to 250 MB · [Pro: unlimited links, bigger uploads](https://linkinseconds.com/pricing) Upload time is file size in bits divided by your upload speed. Multiply the size in megabytes by 8 to get megabits, divide by your Mbps, then add about 10 to 20% for protocol overhead. A 500 MB file on a 20 Mbps upload takes about 3.5 minutes in theory and roughly 4 minutes in practice. 1 Drag in your files, photos, video, a PDF From your desktop or phone, any file works 1 / 4 creating your link… brand-film.mp4 84 MB Drop to upload brand-film.mp484 MB guidelines.pdf2.1 MB product-photos4 files Proposal PDF Your link was just opened First view · 2 min after you sent it New 1 video · 1 PDF · 4 photosOpens in the browser Opened·first view 2 min after sending By the numbers 2,600+ people sharing files 5,100+ links shared 17,400+ times opened Upload time is file size in bits divided by your upload speed. Multiply the size in megabytes by 8 to get megabits, divide by your Mbps, then add about 10 to 20% for protocol overhead. A 500 MB file on a 20 Mbps upload takes about 3.5 minutes in theory and roughly 4 minutes in practice. ## How to estimate an upload in three steps - 1 ### Find the file size Right-click the file and open Properties (Windows) or Get Info (Mac) to see its size, then type it in with the right unit: KB, MB or GB. - 2 ### Test your upload speed, not just download Run any speed test and note the upload number in Mbps. That is the one that limits how fast a file leaves your device. Pick a preset if you only know your plan speed. - 3 ### Read the range The calculator shows a best case with no overhead and a realistic range with 10 to 20% added. If the result is hours, try a wired connection or a quieter time of day. ## Megabits vs megabytes: the 8x trap Internet speeds are sold in megabits per second (Mbps, small b). File sizes are measured in megabytes (MB, big B). One byte is 8 bits, so a 100 Mbps connection moves at most about 12 megabytes per second, not 100. Most surprise at slow uploads comes from reading Mbps as MB/s. This calculator does the conversion for you, and counts file sizes the way Windows and this site do: 1 MB is 1,024 KB and 1 GB is 1,024 MB. ## Why real transfers are slower than the math Every file travels in packets wrapped in TCP/IP, TLS encryption and HTTP framing, and some packets are resent. Together that usually costs somewhere around 10 to 20% of your line speed. That figure is an estimate, not a constant: it depends on the server, the distance and how busy your network is. The best case shown is the theoretical floor; the range is what to plan around. ## Wi-Fi vs cable A wired Ethernet connection usually gets close to the speed you pay for. Wi-Fi often does not: walls, distance from the router, neighbouring networks and other devices on the same network can cut real throughput well below the plan speed. For a big upload, plug in a cable or sit near the router, and pause cloud backups and streaming on other devices while it runs. ## Upload once, share a link If you are sending the same large file to several people, upload it one time and send a link instead of attaching it again and again. On Link in Seconds a free file can be up to 250 MB, and the people you share it with stream or download it in the browser without an account. ## Frequently asked questions Still stuck? [Ask us directly](https://linkinseconds.com/contact) and a real person answers. At 10 Mbps upload, about 16 to 17 minutes; at 50 Mbps about 3 minutes; at 100 Mbps under 2 minutes. Those include a 10 to 20% allowance for protocol overhead, so treat them as estimates. Most home cable and DSL plans are asymmetric: upload is often a fifth or a tenth of the download speed. Fibre is often symmetric. Run a speed test and use its upload figure for uploads. Mbps is megabits per second, the unit internet plans use. MB/s is megabytes per second, the unit file sizes use. One byte is 8 bits, so 100 Mbps moves at most about 12 MB of data per second. No. You type a size and a speed, and the math runs in your browser. Nothing is sent to a server and no account is needed. ## Keep reading [Which way should you send this file? A 30-second decision guideOne flowchart for every kind of send](https://linkinseconds.com/blog/which-way-to-send-a-file)[Every app's file size limit in 2026, and the second limit each one hidesThe advertised number, and the real one](https://linkinseconds.com/blog/file-size-limits-by-app)[How to send a file without uploading it anywhereDevice to device, nothing stored, no size cap](https://linkinseconds.com/blog/send-files-without-uploading-them) ## Every link feature is free. Pro adds room and website hosting. [Compare every plan →](https://linkinseconds.com/pricing) Free $0 free forever 50 links · 500 MB total · every link feature - Password, expiry & view limits - Advanced analytics + notify-on-open - Custom name, your domain, no branding - Links never expire, nothing goes offline [Start free](https://linkinseconds.com/signup) Pro · Monthly $9/mo billed $9 every month Unlimited links · 15 GB · 500 MB per file - Everything in Free, every link feature - Host up to 10 websites from a .zip - Links keep working if you cancel - Cancel anytime [Go Pro](https://linkinseconds.com/pricing) Most popular Lifetime $149$99 once one payment, no renewals Unlimited links · 30 GB · pay once, keep it - Website hosting, with the most storage and sites - One payment, no subscription - Best value for steady client work - 30 GB storage, 500 MB per file [Buy Lifetime](https://linkinseconds.com/pricing) Pro · Yearly $4.08/mo billed $49/yr Unlimited links · 15 GB · billed once a year - Save 55% vs paying monthly - Everything in Free, every link feature - Host up to 10 websites from a .zip - Links keep working if you cancel - Cancel anytime [Go Pro](https://linkinseconds.com/pricing) Coming from WeTransfer, DocSend or tiiny.host? [See the comparisons →](https://linkinseconds.com/wetransfer-alternative) ## Your link is 10 seconds away Sign in free with Google (one tap, no form) and share one clean, trackable link. [Get started free](https://linkinseconds.com/signup) ## Explore more [Email attachment size checker](https://linkinseconds.com/email-attachment-checker)[Send large files via email](https://linkinseconds.com/send-large-files-via-email)[Direct Send (peer-to-peer)](https://linkinseconds.com/transfer)[Share files online](https://linkinseconds.com/share-files-online)[Video to link](https://linkinseconds.com/video-to-link) Source: https://linkinseconds.com/upload-time-calculator