Leagues to Miles Converter

The league is an old unit whose length was not always the same. This converter makes you choose your league type (English, nautical, French) and then converts to miles, kilometers and meters, so you get an unambiguous value.

Result

Miles

3.000000

Kilometers

4.828032

Meters

4828.032

Converted 1 English league → 3 mi → 4.8280 km

Reference: common league definitions

League type Miles Kilometers Notes
English land league 3 mi 4.828032 km 3 statute miles (1 mi = 1609.344 m)
Nautical league 3 nmi 5.556 km 1 nmi = 1852 m → 3 × 1852 = 5556 m
French league (lieue) ~2.48548 mi 4 km Often rounded to 4 km

How the converter works

Because “league” isn’t a fixed modern SI unit, we normalize each variant to meters, then to miles and kilometers.

Formulas

English land league: 1 league = 3 × 1609.344 m = 4828.032 m

Nautical league: 1 league = 3 × 1852 m = 5556 m

French league: 1 league = 4000 m

Then: miles = meters / 1609.344; kilometers = meters / 1000

Example

Convert 2 nautical leagues:

2 × 5556 m = 11,112 m → 11,112 / 1609.344 = 6.904 mi → 11.112 km

Always match the source document’s league definition (historical texts often mean French leagues).


Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
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Formula (extracted text)
English land league: 1 league = 3 × 1609.344 m = 4828.032 m Nautical league: 1 league = 3 × 1852 m = 5556 m French league: 1 league = 4000 m Then: miles = meters / 1609.344; kilometers = meters / 1000
Variables and units
  • No variables provided in audit spec.
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
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