# Singapore → Sydney, Australia RTT

🇸🇬 **Singapore (SIN)** → 🇦🇺 **Sydney, Australia (SYD)**

Measurement round: `2026-08-16T04:07:28Z`.

During the 2026-08-16T04:07:28Z measurement round, ICMP echo probes from Singapore, Singapore to Sydney, Australia recorded an average round-trip time of 94.5 ms, a minimum of 92.37 ms, and a maximum of 99.4 ms. The 50-probe sample carried zero packet loss.

The path's 1.76 ms standard deviation and 1.47 ms jitter kept the latency tier at 'Good'. At 94.5 ms, the average RTT was 1.53x the 61.63 ms fiber floor for the 6,293.5 km great-circle distance, an efficiency of 65.2% relative to a direct optical path.

In the 19-outbound-route set used for this round, the route ranked fifth. Its observed variability was lower than the network-wide median of 3.28% of average RTT, and the narrow 92.37–99.4 ms window points to a steady path during the measurement period.

## Latency Summary

| Metric               | Value                                                      |
| -------------------- | ---------------------------------------------------------- |
| RTT                  | **94.5 ms**                                                |
| Jitter               | **1.47 ms**                                                |
| Packet Loss          | **0%**                                                     |
| Standard Fiber Floor | **61.63 ms**                                               |
| Fiber Efficiency     | **65.2%**                                                  |
| Latency Tier         | Good                                                       |
| Source Region        | [Asia Pacific](/docs/network/latency/regions/asia-pacific) |
| Destination Region   | [Asia Pacific](/docs/network/latency/regions/asia-pacific) |

## 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.

## 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](#about-this-measurement) for citation guidance.

## Theoretical Fiber Latency

The public physical reference uses the GeoNames city centres for [Singapore](https://www.geonames.org/1880252) (1.28967, 103.85007) and [Sydney](https://www.geonames.org/2147714) (-33.86785, 151.20732). It does not disclose either facility address.

| Physical Reference                            | Value          |
| --------------------------------------------- | -------------- |
| WGS-84 geodesic distance                      | **6,293.5 km** |
| Vacuum RTT floor                              | **41.99 ms**   |
| Standard fiber RTT floor ($n_g=1.4679$)       | **61.63 ms**   |
| Low-latency fiber material floor              | **61.38 ms**   |
| Engineering floor (5% path allowance)         | **64.72 ms**   |
| Research 1.33× mapped-fiber reference         | **81.97 ms**   |
| Estimated unamplified path loss               | **1321.6 dB**  |
| Transparent optical spans / inline amplifiers | **83 / 82**    |
| Published RTT inflation over fiber floor      | **1.53×**      |

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](/docs/network/latency/theoretical-fiber-latency).

## Stability & Trend

The current measurement round (2026-08-16T04:07:28Z) collected 50 ICMP echo samples on this route. Distribution statistics from that round:

| Round Statistic    | Value        |
| ------------------ | ------------ |
| Minimum RTT        | **92.37 ms** |
| Average RTT        | **94.5 ms**  |
| Maximum RTT        | **99.4 ms**  |
| Standard deviation | **1.76 ms**  |
| Stdev / average    | **1.9%**     |

## Route Context

* Departure PoP: [Singapore (SIN)](/docs/network/latency/sin-singapore)
* Destination PoP: [Sydney (SYD)](/docs/network/latency/syd-sydney)
* Region overview: [Asia Pacific](/docs/network/latency/regions/asia-pacific) → [Asia Pacific](/docs/network/latency/regions/asia-pacific)
* Full global matrix: [Backbone Latency Matrix](/docs/network/latency)
* Physical methodology: [Theoretical Fiber Latency](/docs/network/latency/theoretical-fiber-latency)

## Related City-Pair Routes

**Reverse direction**

* [Sydney to Singapore latency and RTT](/docs/network/latency/pairs/syd-sin-rtt) — 94.5 ms

**Fastest routes departing Singapore (SIN)**

* [Singapore to Hong Kong latency and RTT](/docs/network/latency/pairs/sin-hkg-rtt) — 30.8 ms
* [Singapore to Taipei latency and RTT](/docs/network/latency/pairs/sin-tpe-rtt) — 45.8 ms
* [Singapore to Tokyo latency and RTT](/docs/network/latency/pairs/sin-tyo-rtt) — 68.9 ms
* [Singapore to Melbourne latency and RTT](/docs/network/latency/pairs/sin-mel-rtt) — 88.6 ms
* [Singapore to Marseille latency and RTT](/docs/network/latency/pairs/sin-mrs-rtt) — 140.6 ms

**Fastest routes arriving at Sydney (SYD)**

* [Melbourne to Sydney latency and RTT](/docs/network/latency/pairs/mel-syd-rtt) — 9.8 ms
* [Tokyo to Sydney latency and RTT](/docs/network/latency/pairs/tyo-syd-rtt) — 101.9 ms
* [Taipei to Sydney latency and RTT](/docs/network/latency/pairs/tpe-syd-rtt) — 133.2 ms
* [Hong Kong to Sydney latency and RTT](/docs/network/latency/pairs/hkg-syd-rtt) — 137.2 ms
* [Los Angeles to Sydney latency and RTT](/docs/network/latency/pairs/lax-syd-rtt) — 137.6 ms

**Same corridor (Asia Pacific → Asia Pacific)**

* [Sydney to Melbourne latency and RTT](/docs/network/latency/pairs/syd-mel-rtt) — 9.8 ms
* [Hong Kong to Taipei latency and RTT](/docs/network/latency/pairs/hkg-tpe-rtt) — 14.7 ms
* [Taipei to Hong Kong latency and RTT](/docs/network/latency/pairs/tpe-hkg-rtt) — 15.5 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](/opendata/latency/). Per-pair files are available at `/opendata/latency/latest/pairs/sin-syd.pings.{csv,json,yaml}`. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Singapore → Sydney round 2026-08-16T04:07:28Z, CC BY 4.0".

***

*Data auto-generated on August 16, 2026. Explore the [full interactive latency matrix](/docs/network/latency) or browse more [city-pair routes](/docs/network/latency/pairs).*

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## License and attribution

- **Canonical source:** [View the human-readable HTML page](https://hatsnet.io/docs/network/latency/pairs/sin-syd-rtt).
- **Original documentation:** © Hats Network Inc., licensed under [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/).
- **Public latency data:** © Hats Network Inc., licensed under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/).
- **Full terms:** [Content and Data License](https://hatsnet.io/docs/legal/content-and-data-license) — includes attribution requirements, third-party material, trademarks, source code and other exclusions.