Upload speed measures how quickly data travels from your device to the internet, in megabits per second (Mbps). It matters whenever you send information out: video calls, posting photos and videos, cloud backups, sending email attachments, and live streaming.
How it's measured
Our test generates temporary, random data in your browser and sends it to the server over several connections, measuring how many bits per second are transmitted. The uploaded data is discarded immediately and never stored. As with download, a short warm-up period is excluded for accuracy.
Why is upload usually slower than download?
Most home broadband (cable and DSL) is asymmetric: providers allocate more bandwidth to download because that's what most people use most. Fiber connections are often symmetric, giving you the same speed in both directions.
How much upload do you need?
- HD video calls: 3–5 Mbps
- Cloud backups & large file sharing: 10 Mbps+
- Live streaming in HD: 5–10 Mbps
- Working from home with video: 5 Mbps+ for a smooth experience
Frequently asked questions
Why is my upload speed lower than download?
Most consumer broadband (cable, DSL) is asymmetric — designed to download far more than upload. Fiber connections are often symmetric, offering equal upload and download speeds.
What upload speed do I need for video calls?
A stable 3–5 Mbps upload is enough for HD video calls. Streaming to platforms or uploading large files benefits from 10 Mbps or more.
Does upload speed affect online gaming?
Gaming uses relatively little upload bandwidth, but a stable connection with low latency matters more than raw upload speed. High upload usage in the background can still cause lag.
Ready to check your connection?
Run a free speed test