Internet Speed Test - Ping, Jitter, Download & Upload
Measure your ping, jitter, download and upload speed, and learn how to read the results and get an accurate measurement.
Guide: How the Internet Speed Test Works
The speed test measures four things about your current connection to our server: latency (ping), jitter, download speed and upload speed. Latency is how long a tiny request takes to make a round trip, in milliseconds. Jitter is how much that latency varies between requests, which matters for video calls and online games. Download and upload speeds are measured in megabits per second (Mbps) by transferring test data and timing it.
For the download test your browser fetches a test file several times; for the upload test it sends randomly generated data that the server discards immediately. We do not store the uploaded data or link results to you. Because the test runs against a single server, results show the speed of the path between you and that server, which can differ from tests run against servers closer to you.
How to get an accurate result
- Close other tabs, downloads, streaming and cloud backups that might be using bandwidth.
- If possible use a wired connection, or sit close to your Wi-Fi router.
- Press Start and wait for all phases (ping, download, upload) to finish.
- Run the test two or three times and look at the typical value rather than a single result.
- Compare the result with the plan your provider sells. Speeds are usually advertised in Mbps, not MB/s (1 MB/s = 8 Mbps).
What the numbers mean
- Ping under 30 ms feels instant for browsing and gaming; 30–100 ms is fine for most tasks; above 150 ms you may notice lag in calls.
- A 4K video stream needs roughly 25 Mbps of download; HD video calls need about 3–4 Mbps in both directions.
- High jitter (more than about 30 ms) with an otherwise good speed often points to Wi-Fi interference or a congested network.
More questions
Why is my result lower than the speed I pay for?
Wi-Fi signal, other devices on the network, the distance to our server and busy evening hours all reduce measured speed. A wired test at a quiet time is the best comparison.
Why is upload slower than download?
Most home connections (ADSL, cable and many fibre plans) are asymmetric by design and give far more download than upload capacity.
Does the test use my data allowance?
Yes. A full run transfers tens of megabytes, so be careful on metered mobile connections.