Connection guide
Latency explained: what is a good ping?
Latency is the gap between asking for something and the first reply coming back. Bandwidth gets the marketing, but latency is what makes a connection feel snappy or broken.
Good latency ranges
Under 30 ms is excellent. 30 to 80 ms is comfortable for browsing and video calls. 80 to 150 ms is fair. Past 150 ms, calls, games, and remote desktops start to feel laggy.
Why jitter matters
Jitter is how much latency wobbles between samples. A connection that averages 40 ms can still feel awful if some responses arrive in 20 ms and others stall for 200.
How OnlineCheck reads it
The check runs several small requests and reports average, min, max, and jitter alongside a plain-English label. It is not a lab instrument, but it is usually enough to tell whether timing is what is making your call or site feel slow.
Latency versus download speed
Download speed tells you how much data can move once the pipe is flowing. Latency tells you how long every interaction waits before anything starts. A fast connection with poor latency or unstable jitter will still feel sluggish on calls.
What to compare
Run the check on Wi-Fi, then on cellular or another network. If latency drops a lot, the first network is the suspect. If it stays poor everywhere, the problem is probably on the device (VPN, browser, security software), or simply the distance to whatever service you are reaching.