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Category Network Utilities

Target Network Category

Test Mode

Avg Latency

milliseconds

Jitter

ms (variance)

MoS Score

Quality (1-5)

Packet Loss

% Failed

Real-Time Latency Visualization

< 50ms < 150ms > 150ms

Endpoint Performance

Provider	Region	Avg (ms)	Min	Max	Dev (σ)	Status
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About

This is not a standard speed test. Speed tests measure bandwidth (how much data can fit in the pipe). This tool measures Latency (how fast the data travels) and Stability (how consistent the travel time is). In high-frequency trading, competitive gaming, and VoIP calls, bandwidth is secondary; latency is king.

We utilize the browser's Fetch API to measure the HTTP Round Trip Time (RTT) to over 100 global endpoints. Unlike command-line ICMP pings, this method reflects the actual application-layer performance of web protocols. We calculate critical metrics including Jitter (variance), Standard Deviation (consistency), and the Mean Opinion Score (MoS), a telecommunications standard for rating voice call quality.

Formulas

1. Jitter (RFC 3550): Calculated as the smoothed mean of differences between consecutive latencies.

Jnew = Jold + | Di-1,i | − Jold16

2. Standard Deviation: A more robust measure of connection stability.

σ = √N∑i=1 (x_i − x)²N

3. Estimated MoS (Mean Opinion Score): Derived from effective latency (Leff) which accounts for jitter and packet loss.

R = 94.2 − 0.024Leff − 0.11(Leff − 177) H(Leff − 177)

Where H is the Heaviside step function. The result R is then mapped to a 1-5 scale.

Reference Data

Metric	Symbol	Good Range	Formula / Definition
Latency	L	1 - 40 ms	Time taken for a packet to travel source → destination → source.
Jitter	J	< 15 ms	The average variation between consecutive latency measurements. High jitter causes rubber-banding.
Standard Deviation	σ	< 10	Measures how spread out the latency values are from the mean. Lower is better.
MoS Score	M	4.0 - 5.0	Telecommunications standard (1-5) rating call quality derived from latency and packet loss.
Packet Loss	P	0 %	Percentage of requests that failed to return within the timeout window.
p99 Latency	p₉₉	Contextual	The worst 1% of your pings. Reveals lag spikes that averages hide.

Frequently Asked Questions

Speed tests saturate your connection to find maximum bandwidth (Mbps). This tool sends lightweight signals to measure responsiveness (ms). You can have 1000 Mbps download speed but still experience terrible lag in gaming if your Latency or Jitter is high.

Jitter should ideally be below 30ms. For competitive gaming (FPS) or VoIP (Zoom/Teams), jitter under 5ms is considered excellent. If your jitter is higher than your ping, your connection is extremely unstable.

Packet loss in this tool usually indicates one of three things: 1) Your firewall/ad-blocker is blocking specific tracking domains (common with analytics endpoints). 2) The server is temporarily down. 3) You have genuine network congestion or Wi-Fi signal interference.

Yes, for comparative analysis. While it adds 1-5ms of overhead compared to raw ICMP (CMD) ping due to the TCP handshake, it accurately represents the "Web Latency" you experience when browsing, loading APIs, or using web-based apps.

1. Switch from Wi-Fi to Ethernet (Cable). 2. Check for background downloads (Steam updates, 4K streaming). 3. Reboot your router to clear its RAM cache. 4. If the problem persists, show the CSV export from this tool to your ISP.