Why Zoom is lagging
Zoom lag often points to unstable Wi-Fi, low upload speed, high jitter or a busy home network.
Start by separating the broadband line from home Wi-Fi. Test near the router and, if possible, over Ethernet.
What to test first
- Run a LinkSpeed test and note download, upload, ping and jitter.
- Repeat close to the router.
- Use Ethernet if possible.
- Check whether the issue happens at certain times.
- Compare against your expected package.
Common causes
- Weak Wi-Fi signal or interference.
- Router overload.
- Large downloads, cloud backups or uploads.
- Provider congestion or a local fault.
- High latency, jitter, packet loss or bufferbloat.
How to improve it
Test upload speed and jitter close to the router. Use Ethernet if call quality matters.
If the problem remains over Ethernet, keep a note of your results and contact your provider with the figures.