Download vs upload speed: what is the difference?
Download speed is how fast data reaches you, and upload speed is how fast you send data out. Most home plans have much faster download than upload, which suits streaming and browsing. Upload matters for video calls, cloud backups, sharing large files and working from home.
The two directions
- Download is data coming to you: streaming, web pages, game downloads, app updates.
- Upload is data leaving you: your video in a call, photos going to the cloud, files you send, a live stream.
Why plans are lopsided
Most online activity is downloading, so many plans give far more download than upload. Some technologies, such as cable and DSL, are built that way. Fibre plans are often more balanced, and some offer equal speeds in both directions. Look at both numbers when you compare plans.
Who needs a good upload speed
| What you do | What to expect |
|---|---|
| Video calls | About 1.2 Mbps up for a 720p call and 3.8 Mbps up for a 1080p call, according to Zoom, per person on the line. |
| Cloud backups and photo sync | As much upload as you have. It decides how long the backup takes, and it can crowd out calls while running. |
| Sending large files | Time is set by upload speed. A slow upload turns a 1 GB file into a long wait. |
| Live streaming | Several Mbps, depending on the quality you broadcast. |
| Working from home | Calls, screen sharing and file transfers all use upload, often at the same time. |
| Browsing, streaming and gaming | Very little upload. Download and ping matter more. |
What is a good upload speed
SpeedUp treats an upload of at least 3 Mbps, together with low jitter, as stable for video calls. From 1.5 to 3 Mbps calls may stutter if others use the network, and below 1.5 Mbps they are likely to drop. If several people in the house make video calls at once, add up their needs. A target of about 5 Mbps per person on a call leaves comfortable headroom.
It is normal for upload to read much lower than download on your result. That is how the plan is built. It only deserves attention if it is far below what your plan promises, or too low for what you do.