Video Call Test
A short measurement checked against the four numbers that decide whether a video call works: download, upload, latency and jitter.
Call readiness test
A short full test: latency, download and upload, with a verdict for this page.
Download
—Mbps
Upload
—Mbps
Ping
—ms
Jitter
—ms
Connection type
—
Data used
—
- Download — 4 Mbps or more for group HD
- Upload — 4 Mbps or more for group HD
- Latency — under 150 ms
- Jitter — under 30 ms
Ready. Nothing is measured until you start.
What calls need
| Requirement | One-to-one HD | Group HD / screen share |
|---|---|---|
| Download | 1.5–4 Mbps | 4 Mbps+ |
| Upload | 1.5–4 Mbps | 4 Mbps+ |
| Latency | under 150 ms | under 150 ms |
| Jitter | under 30 ms | under 30 ms |
Platforms differ in their exact numbers and adapt continuously: when bandwidth drops they lower resolution rather than ending the call. That is why a marginal connection usually shows up as blurry video or robotic audio instead of a clean failure.
The usual culprit: upload
Most call problems come from the uplink. A plan with 300 Mbps down and 15 Mbps up is comfortable for one HD call but struggles when two people take part in different calls at once, especially if a cloud backup is also uploading.
If this test shows healthy download but low upload, close background sync tools and re-run before assuming the worst.
Improving call quality
- Use Ethernet for the device you take calls on, or sit closer to the router.
- Pause cloud backups and large uploads during meetings.
- Enable queue management on the router if this page's sibling test, bufferbloat, grades badly.
- Prefer 5 GHz Wi-Fi over 2.4 GHz, and avoid taking calls far from the access point.
- In the call app itself, turn off HD video when the connection is marginal.