How long will your video
take to upload?
File size and your uplink speed become an honest range — not the fantasy number size ÷ speed gives you.
Two things bend every upload estimate: a single connection is limited by the route, not your plan, and protocol overhead eats a slice of whatever is left. Both are in the maths below.
The upload figure from a speed test.
StreamNeo uses parallel chunks for files above 150 MB. Single connection is what a plain browser form upload does.
Not sure of the file size?
A 60-minute 1080p video file is very roughly 3.35 GB. Type that into the size box above if you want to use it — but check your real file size when you can.
Realistic upload time
31 min – 38 min
Size ÷ speed would claim 28 min
Parallel parts
18
sent simultaneously
Usable throughput
20.0 Mbps
Limited by
Your line
a faster plan would help
A 4 GB file on a 20 Mbps uplink should finish in roughly 31 min to 38 min. Plain size ÷ speed says 28 min, which no real upload reaches — protocol overhead, TLS and retransmits always take a cut.
The same file on one connection would take up to 1 hr 49 min — roughly 2.9× longer. That gap is the entire reason large uploads are chunked.
Same file, different connections
| Upload speed | Fast end | Slow end | Usable |
|---|---|---|---|
| 5 Mbps | 2 hr 4 min | 2 hr 32 min | 5.0 Mbps |
| 20 Mbps | 31 min | 38 min | 20.0 Mbps |
| 50 Mbps | 12 min | 15 min | 50.0 Mbps |
| 100 Mbps | 6 min | 7 min | 100.0 Mbps |
Uploads are resumable. If your connection drops, the transfer continues from the last completed chunk instead of starting again.
How this is calculated
Why a range, not a number
Between 8% and 25% of your wire rate goes to TCP, TLS, chunk framing and retransmits. We show the fast end at 92% efficiency and the slow end at 75% — the honest window your upload will land inside.
Parallel chunked uploads
Big files are split and sent as several simultaneous parts, using the real client rule: max(2, min(18, file size ÷ 96 MB)). Parts also rotate across upload hostnames, which sidesteps the browser's six-connections-per-host ceiling.
The per-connection ceiling
A single TCP connection from India to a European datacentre is limited by round-trip time, not by your plan — we observe roughly 7 Mbps per connection on that route. Parallel parts raise the ceiling to about 7 Mbps × the number of parts, still capped by your own line.
Which limit is biting
The result tells you whether your line speed or the per-connection path is the binding constraint. If it says "path", a faster broadband plan will not help much — more parallel parts will.
Questions about this tool
Why is my upload slower than my speed test?
A speed test opens many connections at once and measures the best case. A single-stream upload to one server, especially across continents, is limited by round-trip time and can be a fraction of that figure — which is exactly why files are uploaded in parallel parts.
Does a faster broadband plan always help?
Only until the per-connection path becomes the limit. When this tool says the path is binding rather than the line, the fix is more parallel parts, not more megabits.
Can I close the tab while uploading?
No — the browser is doing the sending. Uploads are resumable, so a dropped connection continues from where it stopped rather than starting over, but the tab needs to stay open while it runs.
Should I compress the file before uploading?
If it was exported at a much higher bitrate than a 24/7 loop needs, yes — a smaller file uploads faster and streams identically. Use the bitrate calculator to see what the loop actually requires.
What this tool cannot tell you
Every calculator on the internet hides its assumptions. Here are ours, in the open.
Your uplink is not your download speed. Most Indian broadband and nearly all mobile plans give you far less upload than download — run a speed test and read the upload number.
The per-connection figure is what we observe on our own India → Falkenstein route. It is a measurement, not a guarantee, and your ISP, peering and time of day all move it.
Wi-Fi is frequently the bottleneck rather than the internet connection. A cable will often beat a better plan.
Uploads pause and resume rather than fail. A number here going wrong costs you waiting time, not the file.
The size estimator is a rough guide only. Real file sizes vary enormously with content, codec and encoder settings — check the actual file size on your device before trusting it.
Next steps
Free tool
Video File Size Calculator
Work out the file size of an export, or the bitrate that fits inside a storage budget.
Free tool
Streaming Bitrate Calculator
Choose export settings for a file that has to look right for weeks, not minutes.
Guide
Slow Internet? You Can Still Run a 24/7 Live Stream
A longer read on the same problem, with the steps this tool skips.
Put your channel live — and leave it live.
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