Ping, Jitter & Bufferbloat Test
Lag in games and calls is usually about delay, not speed. This test measures your idle latency, jitter, and how much latency rises while your connection is fully loaded.
- Connect
- Latency
- Download
- Upload
- Packet loss
- Latency (idle)
- —ms
- Jitter
- —ms
- Latency (download)
- —ms
- Latency (upload)
- —ms
- Packet loss
- —
- Download
- —Mbps
- Upload
- —Mbps
The test could not finish
Your results
Latency under load (bufferbloat)
What this connection is good for
Test details
Results describe the path between your device and the Cloudflare data centre that served the test. Speeds to other websites, game servers or your provider's own test servers can differ. How we measure
What this test measures
- Idle latency (ping): 30 small requests to the nearest Cloudflare data centre, timed with your browser's network timestamps. The median is shown.
- Jitter: the average change between consecutive latency samples.
- Latency during download and upload: latency samples taken while the line is filled with data for 8 seconds in each direction.
- Bufferbloat grade: how much latency rises under load compared with idle.
Because the connection is filled during the test, this test also reports download and upload speed, using less data than the full speed test.
How to read your result
| Measure | Great | OK | Problematic |
|---|---|---|---|
| Idle latency | under 30 ms | 30–80 ms | over 100 ms |
| Jitter | under 5 ms | 5–20 ms | over 30 ms |
| Extra latency under load | under 30 ms | 30–100 ms | over 100 ms |
These ranges are rules of thumb for latency to a nearby server, not industry standards. See the methodology.
Why latency under load matters
Many connections show a great ping when idle, then lag badly the moment someone starts a download or a cloud backup. This effect, called bufferbloat, is caused by oversized queues in routers and modems. It can often be fixed by turning on Smart Queue Management (SQM) in your router.
Your ping to a game server can differ from this result, because game servers may be further away than the Cloudflare data centre used here. Read internet speed for gaming andwhat is jitter to learn more.