Internet latency is the round-trip time (RTT) for a data packet to travel from your device to a server and back, measured in milliseconds. It is the most important metric for interactive internet use — gaming, video calls, remote desktop, live trading, and even web browsing all feel faster or slower based on latency, not download speed. A connection with 500 Mbps download but 150ms latency will feel slower for interactive tasks than a connection with 50 Mbps download and 15ms latency. Latency is determined by physical distance, the quality of your ISP's network, your connection type (fibre vs 4G vs Wi-Fi), and the number of routers your traffic passes through.

Good latency depends on what you're doing. For competitive gaming (FPS, battle royale): under 50ms is required, under 20ms is excellent. For video calls (Zoom, Teams): under 100ms is good, under 50ms is excellent. For web browsing: under 100ms is fine. For VoIP calls: under 100ms is acceptable, above 150ms causes noticeable echo and delay. For remote desktop: under 50ms for a smooth experience. For file downloads and streaming: latency has minimal impact once the connection is established. If you're on Jio FTTH or Airtel fibre in India, you should typically see 5–20ms latency to domestic servers. On Jio or Airtel 4G, expect 30–80ms depending on tower load.

High latency has several common causes: (1) Physical distance — you cannot beat the speed of light. Connecting to a server on the other side of the world will always have 100–300ms minimum latency. (2) Wi-Fi overhead — wireless transmission adds 5–50ms of local latency. Switch to Ethernet to eliminate this. (3) ISP congestion — during peak hours (evenings in India), shared network infrastructure becomes congested. (4) Too many hops — each router between you and the destination adds latency. (5) VPN — adds the round-trip to the VPN server plus encryption overhead. (6) Poor router — budget routers under heavy load add latency from CPU processing. (7) Network congestion on your local connection — other devices downloading heavily increase your latency.

Ping is a specific test (sending ICMP Echo Requests and measuring the round-trip time), while latency is the broader concept of any network delay. In common usage, the terms are interchangeable. The key difference is in how they're measured: Ping (ICMP) measures raw ICMP round-trip time, which may be blocked by firewalls. This latency test measures HTTP response time, which reflects what actual applications experience. Bandwidth tests (like Speedtest.net) also show "ping" which is measured via ICMP. Our dedicated Ping Test tool pings a specific host from our server; this Latency Test measures your connection's response to our server from your browser.

Jitter is the variation in latency between successive measurements — how consistent or erratic your latency is. For example: if your first 10 measurements are 20ms, 21ms, 19ms, 22ms — that's very low jitter (stable). If they're 20ms, 80ms, 25ms, 150ms — that's very high jitter (unstable), even though the average might seem OK. Jitter above 20ms causes audio artifacts in VoIP calls (words cut out, robotic voice). Jitter above 50ms makes gaming erratic — you might have good average latency but experience lag spikes. High jitter is often worse than consistently high latency because applications are optimised for consistent (predictable) latency.

A speed test (like Speedtest.net or Fast.com) measures bandwidth — how many megabits per second can be downloaded or uploaded simultaneously. It tests maximum throughput, which doesn't reflect interactive performance. This latency test measures response time — how quickly our server responds to a single request from your browser. Both metrics are important but for different purposes: bandwidth matters for streaming video and downloading large files; latency matters for gaming, video calls, web browsing, and any interactive application. An internet connection can have excellent speed but poor latency, or poor speed but good latency.

Fast broadband does not guarantee low latency. Common causes of high latency despite good speed: (1) Wi-Fi — wireless adds latency regardless of your plan speed. Ethernet is always lower latency. (2) Distance to server — the latency test server may be geographically far from you. (3) Peak-hour ISP congestion — bandwidth is shared among subscribers; during evening hours, congestion increases latency while speed may still appear OK. (4) Router quality — a congested router CPU raises latency under load. (5) DNS latency — slow DNS resolution adds to page load time, often mistaken for high latency. (6) Too many devices on your network — a saturated connection increases latency for all devices.

The jitter value shown in this test's statistics panel is the mean deviation of your latency measurements from the average — the same formula used by the Linux ping command's "mdev" field. A low jitter value (under 5ms) means your connection is very stable and consistent. A moderate jitter (5–20ms) is normal for most broadband connections. A high jitter (above 20ms) suggests network instability — Wi-Fi interference, congested links, or router issues. For VoIP and gaming, jitter is arguably more important than absolute latency because real-time applications can compensate for consistent high latency (through buffering) but cannot cope with wildly variable latency.

This test is highly accurate for measuring HTTP latency from your browser to our server. It uses the browser's Performance API (performance.now()) which has sub-millisecond precision. The test measures real end-to-end latency including DNS resolution time, TCP connection establishment, TLS handshake, and HTTP response time — exactly what your applications experience. However, it measures latency to our specific server, not to every server on the internet. Your latency to a gaming server or video call server may differ (usually higher if those servers are geographically farther). For server-to-server ping to a specific host, use our Ping Test tool.

Yes — completely free, no account, no signup, no API key required. The test starts automatically when you load the page and continuously measures your latency to our server, updating every second with a live number, animated chart, and statistical summary. You can leave it running to monitor latency over time and observe changes during peak hours. We do not store any connection or location data from your test.