What Is Jitter? Internet Speed Test Guide
Learn what jitter means, why it affects video calls and gaming, and how to reduce unstable internet latency.
Jitter measures how much your ping changes over time.
A stable connection should have consistent ping. If your ping jumps up and down, your jitter is higher.
High jitter can make video calls, voice calls and online games feel unstable.
Quick answer
Jitter is the variation in your connection delay.
Low jitter is good. High jitter means your connection is less stable.
Even if your download speed is fast, high jitter can make your internet feel unreliable.
Ping vs jitter
Ping measures delay.
Jitter measures how much that delay changes.
For example, if your ping stays around 20 ms, your connection is stable.
If your ping jumps from 20 ms to 80 ms to 150 ms and back again, your jitter is high.
Why jitter matters
High jitter can cause problems with real-time internet activities.
You may notice:
- Choppy video calls
- Robotic audio
- Gaming lag
- Sudden delays
- Voice call dropouts
- Unstable live streams
This is because real-time services need a steady connection.
What is a good jitter result?
As a rough guide:
| Jitter result | Meaning |
|---|---|
| 0–5 ms | Excellent |
| 5–15 ms | Good |
| 15–30 ms | Noticeable |
| 30 ms or higher | May cause problems |
Lower is better.
What causes high jitter?
High jitter can be caused by:
- Weak Wi-Fi signal
- Router problems
- Network congestion
- Too many connected devices
- Background downloads
- Mobile signal changes
- ISP routing issues
- VPN usage
- Poor quality equipment
Wi-Fi problems are one of the most common causes.
How to reduce jitter
Try the following:
- Move closer to your router
- Use Ethernet if possible
- Restart your router
- Pause downloads and uploads
- Disconnect unused devices
- Avoid testing while streaming
- Turn off VPNs
- Upgrade an old router
- Test at different times of day
If jitter is much better on Ethernet than Wi-Fi, your Wi-Fi may be the problem.
Jitter and gaming
For gaming, stable latency is very important.
High jitter can cause sudden lag spikes. This can feel worse than having a slightly higher but stable ping.
A stable 40 ms ping may feel better than a connection that jumps between 20 ms and 150 ms.
Jitter and video calls
Video calls need a steady connection.
High jitter can cause:
- Audio breaking up
- Video freezing
- Delays
- People speaking over each other
- Poor call quality
If your video calls are unstable, check jitter as well as upload speed.
Run a speed test to see your jitter.