Latency Test
Test round-trip time (RTT) and packet loss to any host or IP. Enter a hostname or IP and we measure latency in milliseconds. Free, runs from our server.
Run a Latency Test
Enter a hostname (e.g. google.com) or IP address to measure round-trip time and packet loss.
What Is a Latency Test?
A latency test measures how long it takes for a small packet to travel from a source to a destination and back. That round-trip time (RTT) is reported in milliseconds. High latency means more delay — you notice it in video calls, games, and when loading websites. Bandwidth (speed) is different: it's how much data you can push per second. You can have high bandwidth and high latency at the same time (e.g. satellite internet).
This test runs from our server to the host you choose, so you see latency from our network. For latency from your own connection, you can run "ping" in your terminal, or use this tool to compare different hosts. For the full path (each hop), use our traceroute tool. For "is this port open," use our port checker.
How to Use
Enter a hostname (e.g. google.com) or IP address and click "Test latency." You'll see round-trip time (latency) and packet loss when available. Use it to check a game server, your VPN endpoint, or a CDN. To see the IP and location of a host first, use IP lookup or What is my IP for your own.
Features
- Round-trip time (RTT) in milliseconds
- Packet loss percentage
- Works for any hostname or IP
- Free, no signup
Why Use This Tool
Gamers use it to pick the best server. Developers use it to check API or CDN latency. Support teams use it to see if slowness is due to network delay. Pair with DNS lookup when debugging resolution, or reverse DNS lookup to see the hostname for an IP.
FAQs
What is a latency test?
A latency test measures how long it takes for a packet to go from your network to a server and back (round-trip time). Lower latency means snappier responses.
What is good latency?
Under 20 ms is excellent, 20–50 ms is very good, 50–100 ms is good for most uses. Over 150 ms can feel laggy for gaming or video calls.
How do I test latency?
Use our ping test: enter a hostname or IP and we measure round-trip time and packet loss. It runs from our server; for from-your-PC latency, run “ping” in your terminal.
Is latency the same as speed?
No. Speed (bandwidth) is how much data you can move; latency is delay. You can have high speed and high latency (e.g. satellite).
Is the latency test free?
Yes. Our ping-based latency test is free with no signup.