Internet speed test
Download and upload speed, latency and jitter — plus how much latency rises while the line is busy, which is what makes calls stutter on an otherwise fast connection.
Download
–Mbps
Upload
–Mbps
- Latency
- –
- Jitter
- –
- Latency while busy
- –
Ready when you are.
A slow line uses a few megabytes. A very fast one can use up to 469 MB down and 297 MB up, so on a limited mobile plan tick “Use less data”.
Never more than about 39 MB down and 27 MB up. Lines faster than about 100 Mbps will read low.
The test runs between your browser and Cloudflare’s speed test servers (speed.cloudflare.com), and only after you press Start. MyIPKit receives no results and stores nothing.
What the numbers mean
- Download — how fast data reaches you. It decides video quality and how long downloads take.
- Upload — how fast data leaves you. It matters for video calls, cloud backup and sending large files.
- Latency — the round trip to the server with the line idle. Low latency makes everything feel responsive.
- Jitter — how much that round trip varies. High jitter makes calls choppy.
- Latency while busy — the round trip while the line is downloading (↓) or uploading (↑). The rise over idle latency is the one number most home connections get wrong.
How “what this connection handles” is decided
- Web browsing and email: 1 Mbps down.
- HD video: 5 Mbps down. 4K video: 25 Mbps down.
- HD video calls: 3 Mbps each way and latency under 150 ms.
- Online gaming: latency under 50 ms and jitter under 20 ms. Games need little bandwidth.
- Uploading large files: 20 Mbps up.
These are per device. A household streaming on three screens needs three times the download.
Getting a fair measurement
- Test on a cable if you can. If a cable is much faster than wi-fi, the problem is the wireless, not the line.
- Pause other downloads and updates, and close video in other tabs.
- Run it two or three times, at different times of day. A line that is fast in the morning and slow every evening is congested upstream.
If the numbers are bad, a checking order for a bad connection walks through finding where the problem is.
Why is my result lower than my plan?
A plan’s speed is the most the line can carry to your home. Wi-fi, an older device, other people using the connection and the distance to the test server all take a share. Testing on a cable, with nothing else running, shows what the line itself delivers.
Why does another speed test show something different?
Each test measures the path to its own servers, with its own method. This one measures to Cloudflare’s nearest data centre; Netflix’s fast.com measures to Netflix’s. Both are right about their own path, and a large gap between them points at the route rather than your line.
How much data does it use?
It depends on your speed, because each step only runs if the previous one finished in under a second. A slow line uses a few megabytes; a gigabit line can use several hundred. “Use less data” caps every request at 10 MB.
Who sees my data?
Cloudflare sees your IP address and the test traffic, as any server you connect to would. The results are not sent to MyIPKit, and the test is configured not to submit them to Cloudflare’s result collection either.
What is jitter?
How much latency varies from one measurement to the next. Streaming barely notices it, because video is buffered; calls and games do, because every packet is needed on time.