Convert Mile (mi) (mi) to Nautical mile (nmi) (nmi)
Category: Length
1 mi = 0.868976 nmi
High-precision rounding: 6 decimals
How to convert mile (mi) to nautical mile (nmi)
We convert by pivoting through the SI base unit for Length and applying exact factors where applicable.
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Examples
Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).
Common mistakes
- Confusing international foot (0.3048 m) with legacy ‘US survey foot’ in old datasets.
- Rounding mid-calculation; keep precision to the end.
About Length
Length measures distance or size. In SI it derives from the meter, defined via the speed of light, which ensures exact, reproducible conversions. Typical applications include construction, mapping, manufacturing tolerances, and navigation; legacy units like inches and feet remain common in trade and building plans.
About Mile (mi)
Mile (mi)
International mile equals 1,609.344 meters. Used in US/UK road networks, running (marathon splits), and aviation nautical planning conversions.
History: Evolved from the Roman ‘mille passus’ (thousand paces). The international mile was standardized by treaty in 1959 to remove small historical discrepancies.
About Nautical mile (nmi)
Nautical mile (nmi)
Exactly 1,852 meters. Preferred in maritime and aviation because it links to Earth geometry (minutes of arc). Knots (nmi/h) derive from it.
History: Standardized by the International Hydrographic Organization in 1929; earlier definitions tied 1 nmi to 1 minute of latitude varying slightly with geodetic model.