Internet speed test that shows lag, not just Mbps
Tested on Cloudflare servers your ISP doesn’t run. Grades lag under load. Free, no sign-up.
Advanced settings
Best for testing over VPN, or simulating a single file download.
Connections are added gradually while speed is still climbing, so a high maximum needs a longer max duration to be reached.
On by default: loaded latency is measured during both download and upload, and the worse of the two is graded. Turning this off measures it during download only.
Latency to a specific server
Paste an HTTPS address to measure the round-trip time to it, handy for gamers checking the route to a game region. This is the HTTP round-trip, not your in-game ping.
How this speed test works
What it measures
Download and upload speed, idle latency, latency under load, jitter, and the share of requests that fail. Speed alone can look fine while calls and games still stutter, so the lag numbers get equal billing.
Where the servers are
Tests run against Cloudflare’s edge network, not servers inside your ISP. ISP-hosted test servers can sit on a fast lane that real websites never use, so they can flatter the number.
How the lag grade works
We measure latency while the connection is saturated with traffic, then grade the increase from A+ to F. A big jump means queues are filling in your router or modem: that is bufferbloat.
Honest limits
A browser test measures your browser to the nearest Cloudflare location at that moment. Results vary with time of day and WiFi conditions, and links faster than about 1 Gbps may read low.
Speed test questions
Why is my result different from Speedtest.net or my ISP’s own test?
Speed tests differ in where their servers are and how many connections they open. Many use servers inside your ISP’s own network, which is the easiest path your data ever takes. This test uses Cloudflare servers outside it, with four parallel connections. Time of day and other devices on your network also move the number.
What is bufferbloat, or “lag under load”?
Your router and modem keep small queues of waiting data. When the line is busy with an upload, a stream or a video call, those queues fill up and every packet waits longer, so ping spikes even though your speed is fine. The usual fix is a router that supports SQM or QoS smart queue management.
What does the Sygnal Score mean?
It is one number from 0 to 1000 that weighs your speed and your lag together. Lag counts because it is what you actually feel in video calls and online games, while a huge download speed with bad lag still feels bad. Higher is better, and the breakdown shows what held your score back.
Is it my WiFi or my internet?
Run the test close to the router, ideally on a cable or from a few feet away, then again in the room with the problem. If the result only drops far from the router, the weak link is your WiFi, not your provider. Then map the coverage or plan a mesh setup.
Why is upload slower than download?
Most home plans are asymmetric on purpose, because people download far more than they upload. Cable, DSL and 5G home internet often give upload only a fraction of the download speed. Fiber is frequently symmetric. Upload matters most for video calls, cloud backups and sending large files, so it is worth checking.
How much data does a test use?
A test measures each direction for 5 to 10 seconds, stopping as soon as the speed holds steady, so the data it uses scales with your connection. On a 1 Gbps line that is roughly 0.6 to 1.2 GB per direction; at 100 Mbps, about 60 to 120 MB per direction; slower lines use proportionally less. Watch out if you are on a metered or mobile data plan.
Do you store my IP address?
No. We keep an anonymous summary of each result without your IP address for 180 days, and after that only daily aggregates remain. It cannot be linked back to you; it is what makes answers like typical speeds per country and network possible. The privacy page lists exactly what is collected and how it is used.