How to understand latency, jitter, and loaded latency

One-Sentence Answer

Latency is response time, jitter is how much that response time varies, and loaded latency shows whether the connection stays responsive while busy.

Quick Takeaways

• Low baseline latency helps clicks, calls, games, and remote work feel responsive.
• High jitter can make real-time apps feel inconsistent even when average speed is fine.
• Loaded latency matters when someone is uploading, backing up files, or using cameras.
• Good idle latency with poor loaded latency may point to queue congestion or bufferbloat.

Latency is response time

Latency is the round-trip time between your device and the test server. Lower latency usually feels more immediate for web browsing, remote desktops, online games, and video calls.

A browser test cannot identify every network hop, but it can show whether your connection responds quickly during the test.

Jitter is consistency

Jitter measures how much latency changes from one sample to the next. A connection with moderate latency but low jitter can feel steadier than a connection that jumps around unpredictably.

High jitter is especially noticeable in real-time audio, video, gaming, and remote-control tools.

Loaded latency shows busy-link behavior

Loaded latency measures responsiveness while the connection is busy. If loaded latency is much worse than idle latency, uploads, downloads, router queues, or Wi-Fi contention may be contributing.

This is why a household can have a fast plan but still see delayed video calls when cloud backups, cameras, or game uploads are active.

What to test next

If loaded latency is high, pause backups or cameras and repeat the test. If jitter is high, repeat near the router and on another device. If Ethernet also shows the problem, contact support with the saved result.

Frequently Asked Questions