# Johannesburg to Singapore Latency, Ping & RTT | AS203314

🇿🇦 This page compares the published **ping and round-trip time (RTT)** from **Johannesburg (JNB)** to 🇸🇬 **Singapore (SIN)** with vacuum and optical-fiber physical limits.

As of August 10, 2026, the Johannesburg → Singapore route on Hats Network averages 309.5 ms RTT across a 50-sample daily ICMP echo measurement round, 3.65× the theoretical fiber-floor limit of 84.85 ms.

Among the 19 measured routes departing Johannesburg, this route ranks 13th fastest by average RTT.

With a stdev-to-average ratio of 3.3%, this route sits close to the network-wide stability median of 3.1%. Across the round, per-probe RTT ranged from 297.86 ms to 347.43 ms with a standard deviation of 10.36 ms.

## Latency Summary

| Metric               | Value                                                      |
| -------------------- | ---------------------------------------------------------- |
| RTT                  | **309.5 ms**                                               |
| Jitter               | **9.53 ms**                                                |
| Packet Loss          | **0%**                                                     |
| Standard Fiber Floor | **84.85 ms**                                               |
| Fiber Efficiency     | **27.4%**                                                  |
| Latency Tier         | High                                                       |
| Source Region        | [Africa](/docs/network/latency/regions/africa)             |
| 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 [Johannesburg](https://www.geonames.org/993800) (-26.20227, 28.04363) and [Singapore](https://www.geonames.org/1880252) (1.28967, 103.85007). It does not disclose either facility address.

| Physical Reference                            | Value          |
| --------------------------------------------- | -------------- |
| WGS-84 geodesic distance                      | **8,664.2 km** |
| Vacuum RTT floor                              | **57.8 ms**    |
| Standard fiber RTT floor ($n_g=1.4679$)       | **84.85 ms**   |
| Low-latency fiber material floor              | **84.51 ms**   |
| Engineering floor (5% path allowance)         | **89.1 ms**    |
| Research 1.33× mapped-fiber reference         | **112.85 ms**  |
| Estimated unamplified path loss               | **1819.5 dB**  |
| Transparent optical spans / inline amplifiers | **114 / 113**  |
| Published RTT inflation over fiber floor      | **3.65×**      |

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 (2026-08-10) collected 50 ICMP echo samples on this route. Distribution statistics from that round:

| Round Statistic    | Value         |
| ------------------ | ------------- |
| Minimum RTT        | **297.86 ms** |
| Average RTT        | **309.5 ms**  |
| Maximum RTT        | **347.43 ms** |
| Standard deviation | **10.36 ms**  |
| Stdev / average    | **3.3%**      |

## Route Context

* Departure PoP: [Johannesburg (JNB)](/docs/network/latency/jnb-johannesburg)
* Destination PoP: [Singapore (SIN)](/docs/network/latency/sin-singapore)
* Region overview: [Africa](/docs/network/latency/regions/africa) → [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**

* [Singapore to Johannesburg latency and RTT](/docs/network/latency/pairs/sin-jnb-rtt) — 310.5 ms

**Fastest routes departing Johannesburg (JNB)**

* [Johannesburg to London latency and RTT](/docs/network/latency/pairs/jnb-lon-rtt) — 158 ms
* [Johannesburg to Amsterdam latency and RTT](/docs/network/latency/pairs/jnb-ams-rtt) — 163.2 ms
* [Johannesburg to Paris latency and RTT](/docs/network/latency/pairs/jnb-par-rtt) — 164.4 ms
* [Johannesburg to Frankfurt latency and RTT](/docs/network/latency/pairs/jnb-fra-rtt) — 166 ms
* [Johannesburg to Marseille latency and RTT](/docs/network/latency/pairs/jnb-mrs-rtt) — 172 ms

**Fastest routes arriving at Singapore (SIN)**

* [Hong Kong to Singapore latency and RTT](/docs/network/latency/pairs/hkg-sin-rtt) — 30.7 ms
* [Taipei to Singapore latency and RTT](/docs/network/latency/pairs/tpe-sin-rtt) — 45.2 ms
* [Tokyo to Singapore latency and RTT](/docs/network/latency/pairs/tyo-sin-rtt) — 69.8 ms
* [Melbourne to Singapore latency and RTT](/docs/network/latency/pairs/mel-sin-rtt) — 88.1 ms
* [Sydney to Singapore latency and RTT](/docs/network/latency/pairs/syd-sin-rtt) — 95.4 ms

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

* [Johannesburg to Hong Kong latency and RTT](/docs/network/latency/pairs/jnb-hkg-rtt) — 318.4 ms
* [Johannesburg to Taipei latency and RTT](/docs/network/latency/pairs/jnb-tpe-rtt) — 333 ms
* [Johannesburg to Tokyo latency and RTT](/docs/network/latency/pairs/jnb-tyo-rtt) — 362.7 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/jnb-sin.pings.{csv,json,yaml}`. When citing, include the route, the measurement round date, and the dataset version — for example: "Hats Network latency dataset, Johannesburg → Singapore round 2026-08-10, CC BY 4.0".

***

*Data auto-generated on August 10, 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/jnb-sin-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.