Convert miles to Ri (Japanese Mile)
East Asia · East Asian Length · historical · colonial
Historically reconstructed The unit is no longer in use and its value is reconstructed from historical and scholarly sources — treat it as indicative.
1 mile = 0.409815 Ri (Japanese Mile)
Ri (Japanese Mile) = miles × 0.40981513
Convert any amount
miles to Ri (Japanese Mile) table
| miles | Ri (Japanese Mile) |
|---|---|
| 0.25 miles | 0.102454 Ri (Japanese Mile) |
| 0.5 miles | 0.204908 Ri (Japanese Mile) |
| 1 mile | 0.409815 Ri (Japanese Mile) |
| 2 miles | 0.81963 Ri (Japanese Mile) |
| 3 miles | 1.22945 Ri (Japanese Mile) |
| 4 miles | 1.63926 Ri (Japanese Mile) |
| 5 miles | 2.04908 Ri (Japanese Mile) |
| 10 miles | 4.09815 Ri (Japanese Mile) |
| 20 miles | 8.1963 Ri (Japanese Mile) |
| 25 miles | 10.2454 Ri (Japanese Mile) |
| 50 miles | 20.4908 Ri (Japanese Mile) |
| 100 miles | 40.9815 Ri (Japanese Mile) |
About the Ri (Japanese Mile)
Japanese mile ≈ 3.93 km.
- Symbol
- 里
- Value in SI
- 1 Ri (Japanese Mile) = 3,927 metre
- Typical use
- navigation
- Source
- UnitConvertLab measurement atlas
Every atlas conversion routes through the SI metre. See our methodology and data provenance pages for how these values are sourced and verified.
Related units and variant risk
Other east asian length units in the East Asia family, least settled first. If your figure came from a land record, invoice or historical document rather than a calculator, check these before assuming a single standard.
Related conversions
Frequently asked
How many Ri (Japanese Mile) are in a mile?
1 mile = 0.409815 Ri (Japanese Mile). Multiply the number of miles by 0.40981513 to get Ri (Japanese Mile).
What is Ri (Japanese Mile) used for?
Japanese mile ≈ 3.93 km. It is classified as historical and dates from the colonial period.
Is the Ri (Japanese Mile) value exact?
Yes for practical purposes. UnitConvertLab converts every atlas unit through the SI metre, so the arithmetic itself introduces no rounding beyond the digits shown.
How reliable is this Ri (Japanese Mile) conversion?
Historically reconstructed — The unit is no longer in use and its value is reconstructed from historical and scholarly sources — treat it as indicative. Source: UnitConvertLab measurement atlas.
Cite this page
UnitConvertLab. (2026). Convert miles to Ri (Japanese Mile). UnitConvertLab. Retrieved from https://unitconvertlab.com/regional/mile-to-ri-japan
Report an incorrect value or source
Regional units vary by district and by century. If this figure, its variant list or its citation is wrong where you are, tell us — the report carries the page context automatically.