Speed Test Explained: Ping, Jitter, Mbps – What the Numbers Mean

You hit "Start" and get five numbers. Here is what each one really tells you about your Internet.

Download (Mbps)

How fast data reaches your device. 100 Mbps = a 1 GB file in ~80 seconds. The bigger headline number — but rarely the bottleneck.

How fast you can send. Critical for video calls, cloud backup, livestreaming. On cable, often 1/20 of the download.

Round-trip time to the server. Under 20 ms is excellent. Over 80 ms makes gaming and calls feel laggy.

Variation in ping. Low ping but high jitter = robotic voice in calls and rubber-banding in games.

Lost data packets. Anything above 1% breaks real-time apps. Often caused by overloaded Wi-Fi or bad cables.

Latency under load. A connection with 5 ms idle ping but 200 ms while downloading is a bufferbloat problem — fixable with SQM-capable routers.

What is a good ping for gaming?

Under 30 ms for competitive games. Under 50 ms is fine for casual play.

Why is my upload 1/10 of my download?

Cable and DSL networks are asymmetric by design. Only fiber gives you matching upload.

Is 100 Mbps enough for 4K Netflix?

25 Mbps per 4K stream. So 100 Mbps handles 4 streams simultaneously plus normal browsing.

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