Three numbers that matter more than Mbps

Ping, also called latency or round-trip time, measures how long a small message takes to travel to a server and back, in milliseconds. Jitter measures how much ping changes from one moment to the next. Packet loss is the percentage of data packets that never arrive and must be resent or skipped.

Download speed tells you how much data your connection can carry. Ping, jitter and packet loss tell you how quickly and consistently it responds. A 1 Gbps connection with 120 ms ping will still feel laggy in a shooter game.

Real-time activities such as online gaming, video calls, voice chat and cloud gaming depend on these three numbers far more than on raw speed.

What counts as good?

Distance is the biggest factor in ping: light in fibre covers roughly 200 kilometres per millisecond, so a server on another continent always adds delay. Compare your numbers with a nearby server first.

Jitter above about 30 ms usually causes choppy audio and video in calls even when average ping looks fine.

  • Ping under 20 ms: excellent, ideal for competitive gaming.
  • Ping 20–50 ms: good for nearly all games and calls.
  • Ping 50–100 ms: playable, noticeable in fast games.
  • Ping over 100 ms: lag in games, talk-over in calls.
  • Jitter under 10 ms: smooth; over 30 ms: choppy.
  • Packet loss 0%: ideal; over 1%: stutter and dropouts.

What causes high ping and jitter

Wi-Fi is the most common cause. Radio interference, walls and other devices make Wi-Fi retransmit data, which raises jitter. Bufferbloat is the second: when someone uploads a large file or a cloud backup runs, router queues fill up and every packet waits in line, so ping can jump from 20 ms to several hundred.

Other causes include a distant game server, a VPN routed through another country, an overloaded provider network at peak time, and old routers with slow processors.

Packet loss usually points to a physical problem: weak Wi-Fi signal, a damaged cable, a failing modem or a congested link at the provider.

How to reduce lag

Start with the changes that make the biggest difference. Use an Ethernet cable for gaming PCs and consoles. If that is impossible, use 5 GHz or 6 GHz Wi-Fi close to the router. Pick the nearest game server region.

Turn on Smart Queue Management, SQM or a gaming QoS option on the router if it has one; it is the standard cure for bufferbloat. Pause cloud backups and large downloads during matches and calls, and disconnect the VPN or choose a nearby server.

Measure before and after each change so you know what actually helped.

Measure ping and jitter from a terminal
ping -n 20 1.1.1.1     # Windows
ping -c 20 1.1.1.1     # macOS / Linux
# Look at min / avg / max and any lost packets

Common questions

Does faster internet lower ping? Not much. Upgrading from 100 Mbps to 1 Gbps rarely changes ping, though it can help when other people in the home use a lot of bandwidth.

Why is my ping fine in tests but bad in games? The game server may be farther away than the test server, or the game may route traffic differently. Check the server region in the game settings.

Can a VPN lower ping? Occasionally, if your provider routes traffic to a game server poorly. More often it adds delay.