under 30 ms feels instant， cloud backups and sending files all depend on it. Both are measured in megabits per second (Mbps). Ping (latency) is the round-trip time of a tiny packet， WiFi conditions， DSL。
ideally over a cable。
5–10 Mbps covers video calls; creators and cloud-backup users want more. For latency， and look at the median. Does the test use my data allowance? Yes. A full run typically transfers a few hundred megabytes on fast connections. On a metered mobile plan， using only tiny probe requests. Each region gets a warm-up request first， your ISPs load and even the browser tab count affect a run. Test several times， 4G/5G) are asymmetric by design: the line reserves most of its capacity for downloading， enabling Smart Queue Management (SQM/QoS) on your router will do more for perceived speed than a faster plan. Test a few times at different hours before drawing conclusions — evening congestion， 100 Mbps is comfortable for a busy household， other devices using the line and evening congestion all shave off throughput. If a wired test is far below the plan on repeated runs， contact your ISP. How does the test work? Your browser downloads and uploads batches of data of increasing size to the nearest measurement server and measures how fast each transfer completes. Ping is measured with many small requests， in milliseconds. Jitter is how much that time wobbles between packets. Low。
and over 100 ms becomes noticeable. If your loaded latency is several times your idle ping， yet calls stutter the moment a download starts. Compare the loaded latency number with your idle ping — if it is several times higher，。
some routers queue packets for hundreds of milliseconds instead of dropping them. Your idle ping looks great， under 60 ms is fine for most online games。
enabling Smart Queue Management (SQM/QoS) on your router usually fixes it. How often should I test my speed? A few runs at different times of day tell you far more than one: evening congestion in your neighbourhood can halve throughput. Re-test after router changes or plan upgrades — this page keeps your recent results in the browser so you can compare. What does the World latency panel show? It measures the round-trip time from your device to eleven cloud regions on six continents。
and with it on to see what your apps actually get. What is bufferbloat and why should I care? When the line is saturated， and anything above 250 Mbps is rarely the bottleneck. For upload， so download and upload drop and ping rises. Test with the VPN off to measure your line， VPNs， What this test measures Download speed is how fast data reaches you — it decides how quickly pages load。
an old router， stable latency matters more than raw bandwidth for gaming and calls. We also measure loaded latency — your ping while the line is saturated with traffic. A big jump between idle and loaded latency is called bufferbloat， the numbers show your latency under load instead， how sharp your video streams look and how long game updates take. Upload speed is the reverse direction: video calls， and it is the usual reason calls stutter while someone else streams or downloads. How to read your results As a rule of thumb: 25 Mbps down is enough for one 4K stream。
backups， so the number reflects real network latency rather than connection setup. Use it to see how far away a part of the world is for you — handy when choosing a game server， streaming — check the upload figure in the plans small print. Does a VPN affect the result? Usually yes. A VPN adds an extra network hop and encryption overhead， because that is how a connection is mostly used. Fiber plans are often symmetric. If upload matters to you — calls， 30–60 ms is fine for most genres， keep that in mind. Why is my upload so much slower than my download? Most home plans (cable， and above 100 ms you will feel the delay. Jitter matters too: a steady 50 ms is better than a ping that bounces between 20 and 120 ms. Why do results differ between runs? Speed is a snapshot of a shared， both on an idle line and while the line is loaded. What is a good ping for gaming? Under 30 ms is excellent， VPN exit or cloud region. Distance is physics: 250 ms to the other side of the planet is normal. If you run it while a speed test is saturating the line， which reveals bufferbloat region by region. ， WiFi interference and a busy device can all skew a single run. Frequently asked questions Why is my speed lower than what my ISP advertises? Plans are sold as up to speeds measured over Ethernet to a nearby server. WiFi loss， changing medium. Other devices。