one-way fiber latency from distance alone (~5 ms per 1,000 km); ~1.6 ms RT per 100 mi before any processing
~0.80 ms / 100 miobserved
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| As of | 2025 |
| Source | M2 Optics fiber-latency analysis (4.9 µs/km, n≈1.47) · Rule of thumb: 4.9 microseconds per kilometer at refractive index 1.47 (5 µs/km rounded). The per-100-mile figure is guide arithmetic: 160.9 km x 4.9 µs ≈ 0.79 ms one way |
| Review | checking…review by 2027-10-17 · standard cadence |
| Recorded changes | last 2026-07-02 |
| Claim id | one-way-fiber-latency-from-distance-alone-5-ms |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.