ICMP RTT measurement page for Sydney, Australia to Amsterdam, Netherlands. Covers average, jitter, loss, and route context.

🇦🇺 Sydney, Australia (SYD) → 🇳🇱 Amsterdam, Netherlands (AMS)

Measurement round: 2026-08-15T04:03:13Z.

Round 2026-08-15T04:03:13Z recorded ICMP echo RTT from Sydney to Amsterdam at an average of 259.2 ms, with a minimum of 252.22 ms and a maximum of 273.1 ms across 50 samples and zero packet loss.

With a great-circle distance of 16,638.1 km, the theoretical fiber RTT floor is about 162.93 ms. The observed average is 1.59 times that floor, a fiber efficiency of 62.9%, which is relatively tight for such a long intercontinental route.

The route is listed 15th among the 19 routes in the round. Variability is low: standard deviation of 5.31 ms and jitter of 5.74 ms are both around 2% of the average, below the network-wide median variability of 3.08%. This points to a stable, predictable RTT window despite the high absolute latency.

Latency Summary

Metric	Value
RTT	259.2 ms
Jitter	5.74 ms
Packet Loss	0%
Standard Fiber Floor	162.93 ms
Fiber Efficiency	62.9%
Latency Tier	High
Source Region	Asia Pacific
Destination Region	Europe

Ping Measurement Series

The chart below renders the 50-sample ICMP echo measurement round for this route; an accessible table of every sample is included with the chart.

Ping series: SYD → AMS

50 ICMP echo samples at 100 ms intervals · round 2026-08-15T04:03:13Z · avg 259.2 ± 0.75 ms (SE)

Sample distribution: box = interquartile range (255.1–261.4 ms), median 258.2 ms · whiskers = min–max · diamond = round average · each dot is one measured sample.

How to read this chart

The shaded band spans the measured minimum to maximum RTT of all samples collected up to that point, and the thin line traces the running average. The final position therefore matches the round statistics exactly — the band only widens when a new extreme sample arrives.

The dashed line is the round average, and the shaded band at the bottom is the theoretical fiber-optic floor (162.9 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	265.92
2	100	259.36
3	200	254.90
4	300	261.53
5	400	254.69
6	500	254.38
7	600	252.85
8	700	267.11
9	800	260.39
10	900	258.73
11	1000	271.34
12	1100	260.09
13	1200	265.30
14	1300	256.76
15	1400	266.55
16	1500	273.03
17	1600	259.72
18	1700	256.01
19	1800	253.33
20	1900	256.30
21	2000	252.84
22	2100	260.82
23	2200	254.60
24	2300	253.55
25	2400	256.73
26	2500	259.49
27	2600	255.39
28	2700	264.31
29	2800	256.98
30	2900	253.08
31	3000	256.55
32	3100	255.11
33	3200	261.53
34	3300	255.82
35	3400	262.61
36	3500	260.40
37	3600	254.33
38	3700	258.44
39	3800	254.03
40	3900	252.22
41	4000	256.67
42	4100	255.07
43	4200	273.10
44	4300	261.83
45	4400	260.52
46	4500	257.40
47	4600	257.94
48	4700	260.77
49	4800	270.58
50	4900	259.00

Download This Route's Data

This route's measurement round is published as open data (CC BY 4.0) in CSV, JSON, and YAML. See About This Measurement for citation guidance.

Download this dataset

Per-route ICMP ping series, released under CC BY 4.0. Uncompressed plain text — no decompression step needed.

CSV JSON YAML Full dataset

Theoretical Fiber Latency

The public physical reference uses the GeoNames city centres for Sydney (-33.86785, 151.20732) and Amsterdam (52.37403, 4.88969). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	16,638.1 km
Vacuum RTT floor	111 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	162.93 ms
Low-latency fiber material floor	162.28 ms
Engineering floor (5% path allowance)	171.1 ms
Research 1.33× mapped-fiber reference	216.7 ms
Estimated unamplified path loss	3494 dB
Transparent optical spans / inline amplifiers	219 / 218
Published RTT inflation over fiber floor	1.59×

Attenuation is used to estimate the number of 80 km optical spans; it does not directly slow light. See the full theoretical fiber latency, GeoNames, attenuation, and amplifier methodology.

Stability & Trend

The current measurement round (2026-08-15T04:03:13Z) collected 50 ICMP echo samples on this route. Distribution statistics from that round:

Round Statistic	Value
Minimum RTT	252.22 ms
Average RTT	259.2 ms
Maximum RTT	273.1 ms
Standard deviation	5.31 ms
Stdev / average	2.0%

RTT trend

Estimated route stability across the selected time window.

Average: 259.3 ms
Minimum: 256.7 ms
Maximum: 262.2 ms
Average loss: 0.01%

Route Context

Departure PoP: Sydney (SYD)
Destination PoP: Amsterdam (AMS)
Region overview: Asia Pacific → Europe
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

Amsterdam to Sydney latency and RTT — 260.9 ms

Fastest routes departing Sydney (SYD)

Sydney to Melbourne latency and RTT — 9.8 ms
Sydney to Singapore latency and RTT — 94.7 ms
Sydney to Tokyo latency and RTT — 101.6 ms
Sydney to Taipei latency and RTT — 133.2 ms
Sydney to Hong Kong latency and RTT — 135.9 ms

Fastest routes arriving at Amsterdam (AMS)

London to Amsterdam latency and RTT — 5.1 ms
Frankfurt to Amsterdam latency and RTT — 5.9 ms
Paris to Amsterdam latency and RTT — 7 ms
Berlin to Amsterdam latency and RTT — 7.2 ms
Marseille to Amsterdam latency and RTT — 19.6 ms

Same corridor (Asia Pacific → Europe)

Hong Kong to Moscow latency and RTT — 116.6 ms
Taipei to Moscow latency and RTT — 131.7 ms
Singapore to Marseille latency and RTT — 138.8 ms

About This Measurement

Published RTT reflects best-case backbone path behavior measured with ICMP echo probes between PoPs. End-user latency also depends on local access networks, congestion, routing policy, and traffic engineering. None of these values is an SLA.

The measurement round behind this page is published as open data under CC BY 4.0 in the Hats Network latency dataset. Per-pair files are available at /opendata/latency/latest/pairs/syd-ams.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Sydney → Amsterdam round 2026-08-15T04:03:13Z, CC BY 4.0".

Data auto-generated on August 15, 2026. Explore the full interactive latency matrix or browse more city-pair routes.

Sydney, Australia → Amsterdam, Netherlands RTT