Download, upload, ping, jitter, packet loss — your speed test gives you five numbers. This site tells you what they actually mean, whether they're good, and what to do about them.
Every speed test gives you these five metrics. Here is what each one means.
How fast data flows from the internet to your device. Drives streaming, browsing, downloads.
How fast data travels from your device to the internet. Critical for video calls and file sharing.
Round-trip time for a signal. Lower is better. Under 50ms is good for most uses.
How consistently your ping performs. High jitter causes choppy audio and video calls.
Percentage of data that never arrives. Even 1% can disrupt real-time applications.
Now that you know what download, upload, ping, jitter, and packet loss mean — run a test that measures all five accurately. speedtest.now goes beyond a basic speed number: multi-stream testing, loaded latency, a dedicated gaming diagnostics test, and ISP comparison data across 230+ providers in 77 countries.
Enter your speed test numbers and get an instant breakdown - What each metric means, whether it is good or poor, and what to do about it.
Try the Speed ExplainerStart with the topics that matter most to how you use the internet.
Step-by-step guide to diagnosing and fixing slow internet without calling your ISP.
What ping means, why it matters for gaming and video calls, and how to improve it.
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What ping, jitter, and packet loss mean for online gaming - And the numbers you need.
Exact speed requirements for SD, HD, and 4K on Netflix, YouTube, and more.
How to run a speed test that actually reflects your real connection.
Different activities have very different requirements. Find what matters for your situation.
4K needs 25+ Mbps. HD needs 5–25 Mbps. Buffering is caused by low download speed or congestion.
Streaming guide →Speed matters less than ping. You want under 20ms for competitive play. Packet loss ruins sessions.
Gaming guide →Upload speed and jitter matter most. HD Zoom needs around 3 Mbps up and good, stable latency.
Video calls guide →Combine video calls, large uploads, and VPN usage. Upload speed becomes as important as download.
WFH guide →