Netzwerklatenz-Rechner

Jitter is the variation in packet arrival times, calculated as the average difference between consecutive latency readings. Low jitter means consistent delivery times, which is critical for real-time applications like VoIP, video conferencing, and online gaming. High jitter causes audio dropouts, video freezing, and erratic game performance even when average latency seems acceptable.

For gaming, latency under 50ms is excellent and under 100ms is acceptable. For video calls, under 150ms round-trip is comfortable. For general web browsing, under 200ms is barely noticeable. Latencies above 300ms feel sluggish for interactive applications. Standard deviation under 10ms indicates stable, predictable connections.

Standard deviation measures how spread out the latency values are around the mean. A low standard deviation means most pings are close to the average (stable connection), while a high standard deviation indicates spikes and inconsistency. A connection with 80ms mean and 50ms standard deviation is often worse in practice than one with 120ms mean and 5ms standard deviation.

Packet loss is caused by network congestion (routers dropping packets when buffers overflow), faulty cables or wireless interference, misconfigured network equipment, ISP routing issues, or overloaded servers. Even 1–2% packet loss significantly degrades TCP performance because it triggers retransmission and congestion control backoff, reducing throughput far more than the raw percentage suggests.