ICMP RTT from Johannesburg, South Africa, to Singapore: average latency, jitter, packet loss, and route insights from the August 2026 round.

🇿🇦 Johannesburg, South Africa (JNB) → 🇸🇬 Singapore (SIN)

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

ICMP echo requests between Johannesburg and Singapore in the 2026-08-16T04:07:28Z round returned an average RTT of 311.6 ms, with a minimum of 301.09 ms and a maximum of 347.05 ms over 50 samples. Zero packets were lost, and the 9.83 ms standard deviation with 7.03 ms jitter indicates a stable but inherently long-haul path.

This route was 13th in latency among the 19 routes tracked in the same round, putting it just past the midpoint of the set. Its standard-deviation-to-average ratio is about 3.2 percent, slightly below the 3.28 percent median across the network's measured routes, so the delay is mostly steady-state rather than bursty variation.

The great-circle distance of 8,664.2 km implies a vacuum RTT of 57.8 ms and a fiber-floor RTT near 84.85 ms. At 311.6 ms, the route represents a 3.67x overhead over the fiber floor and 27.2 percent fiber efficiency, a useful indicator of how much of the round-trip time sits beyond the minimum possible propagation window.

Latency Summary

Metric	Value
RTT	311.6 ms
Jitter	7.03 ms
Packet Loss	0%
Standard Fiber Floor	84.85 ms
Fiber Efficiency	27.2%
Latency Tier	High
Source Region	Africa
Destination Region	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.

Ping series: JNB → SIN

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 311.6 ± 1.39 ms (SE)

Sample distribution: box = interquartile range (304.9–314.3 ms), median 308.9 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 (84.8 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	301.09
2	100	309.20
3	200	305.57
4	300	314.55
5	400	313.01
6	500	305.23
7	600	310.13
8	700	318.07
9	800	309.03
10	900	304.69
11	1000	306.73
12	1100	303.75
13	1200	305.54
14	1300	303.70
15	1400	309.25
16	1500	306.84
17	1600	303.96
18	1700	302.14
19	1800	301.66
20	1900	304.43
21	2000	304.89
22	2100	324.44
23	2200	309.44
24	2300	306.99
25	2400	303.56
26	2500	303.97
27	2600	302.40
28	2700	321.26
29	2800	313.41
30	2900	327.90
31	3000	322.37
32	3100	327.22
33	3200	318.71
34	3300	311.32
35	3400	347.05
36	3500	317.58
37	3600	312.54
38	3700	311.70
39	3800	307.95
40	3900	318.33
41	4000	309.46
42	4100	304.43
43	4200	309.23
44	4300	306.37
45	4400	308.43
46	4500	308.29
47	4600	304.87
48	4700	308.71
49	4800	323.00
50	4900	345.61

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 Johannesburg (-26.20227, 28.04363) and Singapore (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	3.67×

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

Round Statistic	Value
Minimum RTT	301.09 ms
Average RTT	311.6 ms
Maximum RTT	347.05 ms
Standard deviation	9.83 ms
Stdev / average	3.2%

RTT trend

Estimated route stability across the selected time window.

Average: 311.4 ms
Minimum: 308.2 ms
Maximum: 314.7 ms
Average loss: 0.02%

Route Context

Departure PoP: Johannesburg (JNB)
Destination PoP: Singapore (SIN)
Region overview: Africa → Asia Pacific
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

Singapore to Johannesburg latency and RTT — 312.6 ms

Fastest routes departing Johannesburg (JNB)

Johannesburg to London latency and RTT — 158 ms
Johannesburg to Amsterdam latency and RTT — 163.2 ms
Johannesburg to Paris latency and RTT — 164.4 ms
Johannesburg to Frankfurt latency and RTT — 166 ms
Johannesburg to Marseille latency and RTT — 172 ms

Fastest routes arriving at Singapore (SIN)

Hong Kong to Singapore latency and RTT — 31.5 ms
Taipei to Singapore latency and RTT — 44.3 ms
Tokyo to Singapore latency and RTT — 69.4 ms
Melbourne to Singapore latency and RTT — 88.4 ms
Sydney to Singapore latency and RTT — 94.5 ms

Same corridor (Africa → Asia Pacific)

Johannesburg to Hong Kong latency and RTT — 318 ms
Johannesburg to Taipei latency and RTT — 329.8 ms
Johannesburg to Tokyo latency and RTT — 360.5 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. Per-pair files are available at /opendata/latency/latest/pairs/jnb-sin.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Johannesburg → Singapore round 2026-08-16T04:07:28Z, CC BY 4.0".

Data auto-generated on August 16, 2026. Explore the full interactive latency matrix or browse more city-pair routes.

Johannesburg, South Africa → Singapore RTT