ICMP round-trip time measurement from Paris, France to Tokyo, Japan: 204.7 ms average latency, jitter, packet loss, and distance context.

🇫🇷 Paris, France (PAR) → 🇯🇵 Tokyo, Japan (TYO)

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

The 2026-08-16T04:07:28Z measurement run from Paris to Tokyo produced an average ICMP echo RTT of 204.7 ms from 50 samples, with replies ranging from 194.79 ms to 241.63 ms. Standard deviation was 9.12 ms and jitter was 7.97 ms, so the path carried some variation but did not lose a single probe.

Against the fiber-floor estimate of 95.34 ms for the 9,736.1 km great-circle distance, the observed RTT is 2.15 times higher, yielding a fiber efficiency of 46.6%. That inflation is larger than the raw distance alone would explain and points to cable routing and intermediate handling costs as the main contributors to the 204.7 ms average.

The route ranks 17th among the 19 outbound routes from Paris, placing it on the slower end of the set. The median standard-deviation-to-average ratio across those routes is 3.28%; at about 4.5% of its own average, Tokyo's variability is mildly elevated but not extreme, and the zero-loss result keeps the route within a fair latency tier.

Latency Summary

Metric	Value
RTT	204.7 ms
Jitter	7.97 ms
Packet Loss	0%
Standard Fiber Floor	95.34 ms
Fiber Efficiency	46.6%
Latency Tier	Fair
Source Region	Europe
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: PAR → TYO

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 204.7 ± 1.29 ms (SE)

Sample distribution: box = interquartile range (197.7–207.9 ms), median 203.3 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 (95.3 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	199.64
2	100	196.24
3	200	230.98
4	300	210.88
5	400	202.04
6	500	221.97
7	600	209.40
8	700	208.27
9	800	198.59
10	900	206.09
11	1000	201.23
12	1100	200.80
13	1200	195.71
14	1300	195.31
15	1400	210.50
16	1500	205.79
17	1600	199.80
18	1700	197.70
19	1800	197.35
20	1900	208.08
21	2000	207.24
22	2100	197.48
23	2200	205.98
24	2300	203.65
25	2400	241.63
26	2500	210.66
27	2600	200.27
28	2700	207.22
29	2800	197.48
30	2900	196.21
31	3000	202.88
32	3100	209.41
33	3200	203.74
34	3300	204.22
35	3400	206.90
36	3500	207.48
37	3600	199.16
38	3700	197.49
39	3800	198.08
40	3900	216.93
41	4000	216.70
42	4100	204.95
43	4200	200.21
44	4300	204.30
45	4400	197.82
46	4500	197.48
47	4600	194.79
48	4700	194.90
49	4800	196.95
50	4900	216.42

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 Paris (48.85341, 2.34880) and Tokyo (35.68950, 139.69171). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	9,736.1 km
Vacuum RTT floor	64.95 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	95.34 ms
Low-latency fiber material floor	94.96 ms
Engineering floor (5% path allowance)	100.12 ms
Research 1.33× mapped-fiber reference	126.81 ms
Estimated unamplified path loss	2044.6 dB
Transparent optical spans / inline amplifiers	128 / 127
Published RTT inflation over fiber floor	2.15×

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	194.79 ms
Average RTT	204.7 ms
Maximum RTT	241.63 ms
Standard deviation	9.12 ms
Stdev / average	4.5%

RTT trend

Estimated route stability across the selected time window.

Average: 204.8 ms
Minimum: 202.7 ms
Maximum: 206.7 ms
Average loss: 0.01%

Route Context

Departure PoP: Paris (PAR)
Destination PoP: Tokyo (TYO)
Region overview: Europe → Asia Pacific
Corridor overview: Europe to Asia Pacific
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

Tokyo to Paris latency and RTT — 204.8 ms

Fastest routes departing Paris (PAR)

Paris to London latency and RTT — 6.4 ms
Paris to Amsterdam latency and RTT — 7 ms
Paris to Frankfurt latency and RTT — 7.6 ms
Paris to Marseille latency and RTT — 8.9 ms
Paris to Berlin latency and RTT — 15.5 ms

Fastest routes arriving at Tokyo (TYO)

Taipei to Tokyo latency and RTT — 31.9 ms
Hong Kong to Tokyo latency and RTT — 44.9 ms
Singapore to Tokyo latency and RTT — 68.9 ms
Seattle to Tokyo latency and RTT — 85 ms
Los Angeles to Tokyo latency and RTT — 101.2 ms

Same corridor (Europe → Asia Pacific)

Moscow to Hong Kong latency and RTT — 118.6 ms
Moscow to Taipei latency and RTT — 132.1 ms
Marseille to Singapore latency and RTT — 139.6 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/par-tyo.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Paris → Tokyo 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.

Paris, France → Tokyo, Japan RTT