# Nautical miles to Miles (nmi to mi)

> Convert nautical miles to miles: 1 nmi = 1.15078 mi. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.

- Page id: `nautical-miles-to-miles` · Quantity: Length (`length`, base unit m) · Tool: `convert_units`
- Canonical page: https://tttkmbb.com/conversion/nautical-miles-to-miles · This document: https://tttkmbb.com/conversion/nautical-miles-to-miles.md · JSON: https://tttkmbb.com/conversion/nautical-miles-to-miles.json (add `?value=` for a result)

## Formula

- `1 nmi = 1.15078 mi`
- `miles = nautical miles × 1.150779448`
- Reverse: `nautical miles = miles × 0.8689762419`

The factor follows from the SI definitions of both units (NIST SP 811); values below are rounded to 6 significant figures, the API returns up to 12.

## Worked examples

- 5 nmi = 5.7539 mi
- 12.5 nmi = 14.3847 mi
- 100 nmi = 115.078 mi

## Conversion table

| Nautical miles (nmi) | Miles (mi) |
| --- | --- |
| 1 | 1.15078 |
| 2 | 2.30156 |
| 3 | 3.45234 |
| 4 | 4.60312 |
| 5 | 5.7539 |
| 6 | 6.90468 |
| 7 | 8.05546 |
| 8 | 9.20624 |
| 9 | 10.357 |
| 10 | 11.5078 |
| 15 | 17.2617 |
| 20 | 23.0156 |
| 25 | 28.7695 |
| 30 | 34.5234 |
| 40 | 46.0312 |
| 50 | 57.539 |
| 75 | 86.3085 |
| 100 | 115.078 |
| 200 | 230.156 |
| 250 | 287.695 |
| 500 | 575.39 |
| 1000 | 1150.78 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=nmi&to_unit=mi` → unified JSON envelope with `result.values.result`, `formula`, `factor`, `sources`, `freshness`
- MCP: server `https://tttkmbb.com/mcp`, tool `convert_units` with `{"value":5,"from_unit":"nmi","to_unit":"mi"}`
- All length units: https://tttkmbb.com/api/v1/units?quantity=length · full converter: [Length Converter](https://tttkmbb.com/conversion/length.md)
- Authentication: none. Freshness: `static` (fixed conversion factors).

## FAQ

**How many miles are in one nautical mile?**

1 nmi = 1.15078 mi. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.

**What is the formula to convert nautical miles to miles?**

Multiply the value in nautical miles by 1.150779448: miles = nautical miles × 1.150779448. For example, 5 nmi = 5.7539 mi.

**How do I convert miles back to nautical miles?**

Multiply by the inverse factor 0.8689762419 (nautical miles = miles × 0.8689762419), or use the miles-to-nautical miles page.

## Related conversions

- [Miles to nautical miles](https://tttkmbb.com/conversion/miles-to-nautical-miles.md) (reverse)
- [Kilometers to Miles](https://tttkmbb.com/conversion/km-to-miles.md)
- [Miles to Kilometers](https://tttkmbb.com/conversion/miles-to-km.md)
- [Meters to Feet](https://tttkmbb.com/conversion/meters-to-feet.md)
- [Feet to Meters](https://tttkmbb.com/conversion/feet-to-meters.md)
- [Centimeters to Inches](https://tttkmbb.com/conversion/cm-to-inches.md)
- [Inches to Centimeters](https://tttkmbb.com/conversion/inches-to-cm.md)
- [Millimeters to Inches](https://tttkmbb.com/conversion/mm-to-inches.md)
- [Inches to Millimeters](https://tttkmbb.com/conversion/inches-to-mm.md)

## Data Sources

- NIST Special Publication 811 – Guide for the Use of the International System of Units (SI), Appendix B conversion factors — https://www.nist.gov/pml/special-publication-811 (standard, retrieved 2026-09-24)
- BIPM – The International System of Units (SI Brochure, 9th edition) — https://www.bipm.org/en/publications/si-brochure (standard, retrieved 2026-09-24)
- Wikipedia – Conversion of units — https://en.wikipedia.org/wiki/Conversion_of_units (reference, retrieved 2026-09-24)